mediatek: mt8192: Add Vcore DVFS driver

Change-Id: I4bd4612a7c7727a5be70957ae940e5f51c7ca5e6
diff --git a/plat/mediatek/mt8192/drivers/spm/build.mk b/plat/mediatek/mt8192/drivers/spm/build.mk
index dea9aff..4153603 100644
--- a/plat/mediatek/mt8192/drivers/spm/build.mk
+++ b/plat/mediatek/mt8192/drivers/spm/build.mk
@@ -20,7 +20,8 @@
 	${CUR_SPM_FOLDER}/mt_spm.c		\
 	${CUR_SPM_FOLDER}/mt_spm_conservation.c	\
 	${CUR_SPM_FOLDER}/mt_spm_internal.c	\
-	${CUR_SPM_FOLDER}/mt_spm_pmic_wrap.c
+	${CUR_SPM_FOLDER}/mt_spm_pmic_wrap.c	\
+	${CUR_SPM_FOLDER}/mt_spm_vcorefs.c
 
 # spm platform dependcy files
 PLAT_SPM_SOURCE_FILES +=					\