image_types_tegra: make initrd-flash support configurable

Make the image dependencies and inclusion of the initrd-flash
image conditional on whether TEGRAFLASH_INITRD_FLASH_IMAGE is
non-null.  This allows users to exclude initrd-flash support
from their builds, if desired.

Signed-off-by: Matt Madison <matt@madison.systems>

classes/image_types_tegra.bbclass

@@ -71,7 +71,7 @@ IMAGE_TEGRAFLASH_ESPIMG ?= "${DEPLOY_DIR_IMAGE}/${TEGRA_ESP_IMAGE}-${MACHINE}.es
 DATAFILE ??= ""
 IMAGE_TEGRAFLASH_DATA ??= ""
 
-IMAGE_TEGRAFLASH_INITRD_FLASHER = "${DEPLOY_DIR_IMAGE}/${TEGRAFLASH_INITRD_FLASH_IMAGE}-${MACHINE}.cboot"
+IMAGE_TEGRAFLASH_INITRD_FLASHER ?= "${@'${DEPLOY_DIR_IMAGE}/${TEGRAFLASH_INITRD_FLASH_IMAGE}-${MACHINE}.cboot' if d.getVar('TEGRAFLASH_INITRD_FLASH_IMAGE') != '' else ''}"
 
 TEGRA_SPIFLASH_BOOT ??= ""
 TEGRA_ROOTFS_AND_KERNEL_ON_SDCARD ??=""
@@ -333,7 +333,9 @@ create_tegraflash_pkg:tegra194() {
     cp "${STAGING_DATADIR}/tegraflash/${EMMC_BCT_OVERRIDE}" .
     cp "${IMAGE_TEGRAFLASH_KERNEL}" ./${LNXFILE}
     cp "${IMAGE_TEGRAFLASH_ESPIMG}" ./esp.img
+    if [ -n "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ]; then
         cp "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ./initrd-flash.img
+    fi
     if [ -n "${DATAFILE}" -a -n "${IMAGE_TEGRAFLASH_DATA}" ]; then
         cp "${IMAGE_TEGRAFLASH_DATA}" ./${DATAFILE}
         DATAARGS="--datafile ${DATAFILE}"
@@ -359,6 +361,9 @@ create_tegraflash_pkg:tegra194() {
     copy_dtbs "${WORKDIR}/tegraflash"
     if [ "${TEGRA_SIGNING_EXCLUDE_TOOLS}" != "1" ]; then
         cp -R ${STAGING_BINDIR_NATIVE}/${FLASHTOOLS_DIR}/* .
+	if [ -z "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ]; then
+	    rm -f ./initrd-flash
+	fi
         mv ./rollback_parser.py ./rollback/
         tegraflash_generate_bupgen_script
     fi
@@ -380,6 +385,8 @@ create_tegraflash_pkg:tegra194() {
 MACHINE=${TNSPEC_MACHINE} ./tegra194-flash-helper.sh $DATAARGS flash.xml.in ${DTBFILE} ${EMMC_BCT},${EMMC_BCT_OVERRIDE} ${ODMDATA} ${LNXFILE} ${IMAGE_BASENAME}.${IMAGE_TEGRAFLASH_FS_TYPE} "\$@"
 END
     chmod +x doflash.sh
+
+    if [ -n "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ]; then
         rm -f .env.initrd-flash
 	cat > .env.initrd-flash <<END
 FLASH_HELPER=${SOC_FAMILY}-flash-helper.sh
@@ -401,6 +408,7 @@ DATAFILE="${DATAFILE}"
 EXTERNAL_ROOTFS_DRIVE=${TEGRAFLASH_ROOTFS_EXTERNAL}
 BOOT_PARTITIONS_ON_EMMC=${BOOT_PARTITIONS_ON_EMMC}
 END
+    fi
     if [ -e ./odmfuse_pkc.xml ]; then
         cat > burnfuses.sh <<END
 #!/bin/sh
@@ -448,7 +456,9 @@ create_tegraflash_pkg:tegra234() {
     cp "${STAGING_DATADIR}/tegraflash/${EMMC_BCT}" .
     cp "${IMAGE_TEGRAFLASH_KERNEL}" ./${LNXFILE}
     cp "${IMAGE_TEGRAFLASH_ESPIMG}" ./esp.img
+    if [ -n "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ]; then
         cp "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ./initrd-flash.img
+    fi
     if [ -n "${DATAFILE}" -a -n "${IMAGE_TEGRAFLASH_DATA}" ]; then
         cp "${IMAGE_TEGRAFLASH_DATA}" ./${DATAFILE}
         DATAARGS="--datafile ${DATAFILE}"
@@ -478,6 +488,9 @@ create_tegraflash_pkg:tegra234() {
     copy_dtbs "${WORKDIR}/tegraflash"
     if [ "${TEGRA_SIGNING_EXCLUDE_TOOLS}" != "1" ]; then
         cp -R ${STAGING_BINDIR_NATIVE}/${FLASHTOOLS_DIR}/* .
+	if [ -z "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ]; then
+	    rm -f ./initrd-flash
+	fi
         rm ./rollback_parser.py
         tegraflash_generate_bupgen_script
     fi
@@ -502,6 +515,7 @@ END
     chmod +x doflash.sh
 
     chmod +x doflash.sh
+    if [ -n "${IMAGE_TEGRAFLASH_INITRD_FLASHER}" ]; then
         cat > .env.initrd-flash <<END
 FLASH_HELPER=${SOC_FAMILY}-flash-helper.sh
 BOOTDEV="${TNSPEC_BOOTDEV}"
@@ -522,6 +536,7 @@ DATAFILE="${DATAFILE}"
 EXTERNAL_ROOTFS_DRIVE=${TEGRAFLASH_ROOTFS_EXTERNAL}
 BOOT_PARTITIONS_ON_EMMC=${BOOT_PARTITIONS_ON_EMMC}
 END
+    fi
     if [ -e ./odmfuse_pkc.xml ]; then
         cat > burnfuses.sh <<END
 #!/bin/sh
@@ -607,7 +622,7 @@ do_image_tegraflash[depends] += "${TEGRAFLASH_PKG_DEPENDS} dtc-native:do_populat
                                  ${@'${INITRD_IMAGE}:do_image_complete' if d.getVar('INITRD_IMAGE') != '' else  ''} \
                                  ${@'${TEGRA_ESP_IMAGE}:do_image_complete' if d.getVar('TEGRA_ESP_IMAGE') != '' else  ''} \
                                  virtual/bootloader:do_deploy virtual/secure-os:do_deploy ${TEGRA_SIGNING_EXTRA_DEPS} ${DTB_EXTRA_DEPS} \
-                                 ${TEGRAFLASH_INITRD_FLASH_IMAGE}:do_image_complete"
+                                 ${@'${TEGRAFLASH_INITRD_FLASH_IMAGE}:do_image_complete' if d.getVar('TEGRAFLASH_INITRD_FLASH_IMAGE') != '' else ''}"
 IMAGE_TYPEDEP:tegraflash += "${IMAGE_TEGRAFLASH_FS_TYPE}"
 
 oe_make_bup_payload() {