mediatek/mt8173: Add PMIC wrapper driver

BUG=none
TEST=emerge-oak coreboot
BRANCH=none

Change-Id: Id1e9244e33e34c2c30d7c87cc277ecb7524dfb09
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b21abfdaac4eeb2b65d4c0269ca0b9beff4b5e2f
Original-Change-Id: I84de32de3a09e7857b0695759b49d4db5fde87ec
Original-Signed-off-by: henryc.chen <henryc.chen@mediatek.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/292668
Original-Commit-Ready: Julius Werner <jwerner@chromium.org>
Original-Tested-by: Yidi Lin <yidi.lin@mediatek.com>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/12589
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/soc/mediatek/mt8173/Makefile.inc b/src/soc/mediatek/mt8173/Makefile.inc
index 0d7957e..54b04bd 100644
--- a/src/soc/mediatek/mt8173/Makefile.inc
+++ b/src/soc/mediatek/mt8173/Makefile.inc
@@ -28,6 +28,8 @@
 bootblock-$(CONFIG_DRIVERS_UART) += uart.c
 endif
 
+bootblock-y += pmic_wrap.c
+
 ################################################################################
 
 romstage-y += cbfs.c