hwc: sync-point implementation.

Add sync pt implementation.
Add genlock and sync pt under conditional compilation flags.

Change-Id: I32fb7f6051ccc706662152e90ac15b6b6743f897
Signed-off-by: Iliyan Malchev <malchev@google.com>
diff --git a/common.mk b/common.mk
index 30896a8..ed8edc3 100644
--- a/common.mk
+++ b/common.mk
@@ -21,6 +21,12 @@
 common_flags := -DDEBUG_CALC_FPS -Wno-missing-field-initializers
 common_flags += -Werror
 
+#TODO
+#ifeq ($(call is-vendor-board-platform,QCOM),true)
+ifeq ($(TARGET_BOARD_PLATFORM), msm8960)
+    common_flags += -DUSE_FENCE_SYNC
+endif
+
 ifeq ($(ARCH_ARM_HAVE_NEON),true)
     common_flags += -D__ARM_HAVE_NEON
 endif