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The NX20P3483 is a USB PD and Type C high voltage sink/source combo switch. This CL adds support for this PPC variant. Unlike the TI SN5S330, the NX20P3483 does not support VCONN and does not need to be informed of CC polarity by the TCPM. To account for these differences, 2 new PPC config options are added and the driver for the TI SN5S330 was modified to include these new options. The SNK/SRC switch mode for the NX20P3483 is controlled by 2 GPIO signals which may be connected the EC or directly to the TCPC. To handle both cases, the ppc_chips structure was modified with a flags, snk_gpio, and src_gpio elements. BUG=b:74206647 BRANCH=none TEST=make -j buildall and verified there are no build errors. Change-Id: Ic4415ab7571b80e7661ea673434eaf4cf1f1fd2d Signed-off-by: Scott Collyer <scollyer@google.com> Reviewed-on: https://chromium-review.googlesource.com/966926 Commit-Ready: Scott Collyer <scollyer@chromium.org> Tested-by: Scott Collyer <scollyer@chromium.org> Reviewed-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Furquan Shaikh <furquan@chromium.org>