chromeec: Add kconfig entry for EC PD support

Add a kconfig entry to indicate that a board has a PD chip and
try to put it in RO mode before the EC during early init.

BUG=chrome-os-partner:40635
BRANCH=none
TEST=emerge-glados coreboot

Change-Id: I170271de9b929fcb73d6b0e09171385a6d23f153
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 17e2d13261f4e35a8148039e324e22ec1da64b3c
Original-Change-Id: I44eed5401beb1dc286e316cf0cc958da791580a5
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/297747
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11571
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/ec/google/chromeec/Kconfig b/src/ec/google/chromeec/Kconfig
index 25cc0e4..2a86f33 100644
--- a/src/ec/google/chromeec/Kconfig
+++ b/src/ec/google/chromeec/Kconfig
@@ -47,6 +47,12 @@
 	help
 	  Microchip EC variant for LPC register access.
 
+config EC_GOOGLE_CHROMEEC_PD
+	depends on EC_GOOGLE_CHROMEEC
+	def_bool n
+	help
+	  Indicates that Google's Chrome USB PD chip is present.
+
 config EC_GOOGLE_CHROMEEC_SPI
 	depends on EC_GOOGLE_CHROMEEC
 	def_bool n