cleanup: nyan: remove unnecessary dependence to pmu_tpschrome.h

Nyan uses common/charge_state instead. So, fix the dependence.
Since snow/spring/pit are using common/pmu_tps65090_charger, keep them.

BUG=None
BRANCH=Nyan
TEST=build and works fine on Nyan 3.2

Change-Id: I985f7980578ac22602b1fbffa51edf039078bc05
Signed-off-by: Louis Yung-Chieh Lo <yjlou@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/186337
Reviewed-by: Randall Spangler <rspangler@chromium.org>

board/nyan/board.c

@@ -12,7 +12,6 @@
 #include "i2c.h"
 #include "keyboard_raw.h"
 #include "lid_switch.h"
-#include "pmu_tpschrome.h"
 #include "power.h"
 #include "power_button.h"
 #include "power.h"

include/charge_state.h

@@ -125,6 +125,11 @@ struct charge_state_context {
  */
 enum charge_state charge_get_state(void);
 
+/**
+ * Return non-zero if battery is so low we want to keep AP off.
+ */
+int charge_keep_power_off(void);
+
 /**
  * Return current charge state flags (CHARGE_FLAG_*)
  */

power/tegra.c

@@ -25,6 +25,7 @@
  *
  */
 
+#include "charge_state.h"
 #include "chipset.h"  /* This module implements chipset functions too */
 #include "clock.h"
 #include "common.h"
@@ -36,7 +37,6 @@
 #include "power.h"
 #include "power_button.h"
 #include "power_led.h"
-#include "pmu_tpschrome.h"
 #include "system.h"
 #include "task.h"
 #include "timer.h"