display: Add target specific flag to support Venus color format

Venus color format is not supported on older platforms. Add target
specific flag in display hal and define Venus macros to zero for
older platforms.

Change-Id: I38141ae870e255a0e54ce9fde46fe6cc3415f179
diff --git a/liboverlay/overlayMdssRot.cpp b/liboverlay/overlayMdssRot.cpp
index 39c7f95..ac62170 100644
--- a/liboverlay/overlayMdssRot.cpp
+++ b/liboverlay/overlayMdssRot.cpp
@@ -20,6 +20,12 @@
 #include "overlayUtils.h"
 #include "overlayRotator.h"
 
+#ifdef VENUS_COLOR_FORMAT
+#include <media/msm_media_info.h>
+#else
+#define VENUS_BUFFER_SIZE(args...) 0
+#endif
+
 #ifndef MDSS_MDP_ROT_ONLY
 #define MDSS_MDP_ROT_ONLY 0x80
 #endif