[Feature][ZXW-88]merge P50 version

Only Configure: No
Affected branch: master
Affected module: unknown
Is it affected on both ZXIC and MTK: only ZXIC
Self-test: Yes
Doc Update: No

Change-Id: I34667719d9e0e7e29e8e4368848601cde0a48408
diff --git a/boot/common/src/loader/config.mk b/boot/common/src/loader/config.mk
index 458bb4c..bc87baf 100755
--- a/boot/common/src/loader/config.mk
+++ b/boot/common/src/loader/config.mk
@@ -73,6 +73,10 @@
 PLATFORM_CPPFLAGS+= -DCONFIG_ZX297520V3E_VEHICLE_DC
 endif
 
+ifeq ($(strip $(board)),$(filter $(board),vehicle_dc_ref))
+PLATFORM_CPPFLAGS+= -DCONFIG_ZX297520V3E_VEHICLE_DC_REF
+endif
+
 ifdef	ARCH
 sinclude $(TOPDIR)/$(ARCH)_config.mk	# include architecture dependend rules
 endif