hwc: Add 8084 to the list of mdss targets.

Add 8084 to the list of mdss taregts in make file,
so that the compile time flags are enabled.

Change-Id: Icba9686a5c51b463c5f2c07d3c1781fe23312469
diff --git a/common.mk b/common.mk
index 3fb003b..74d6032 100644
--- a/common.mk
+++ b/common.mk
@@ -27,7 +27,7 @@
     common_flags += -D__ARM_HAVE_NEON
 endif
 
-ifeq ($(call is-board-platform-in-list, msm8974 msm8226 msm8610), true)
+ifeq ($(call is-board-platform-in-list, msm8974 msm8226 msm8610 apq8084), true)
     common_flags += -DVENUS_COLOR_FORMAT
     common_flags += -DMDSS_TARGET
 endif