R3 supports 3 camera_vsync

Make definition consitent by using CAMERA_VSYNC_COUNT for
number of camera_vsync.

Bug: 142108845
Test: Verify the count of camera vsync with command:
      adb shell dumpsys sensorservice | egrep "camera v-sync"
Change-Id: I29d36484ad0e35538b7edee83d5dc125da0ebb83
Signed-off-by: emilchung <emilchung@google.com>
diff --git a/redfin/BoardConfig.mk b/redfin/BoardConfig.mk
index 261f511..c59c46b 100644
--- a/redfin/BoardConfig.mk
+++ b/redfin/BoardConfig.mk
@@ -18,6 +18,8 @@
 TARGET_SCREEN_DENSITY := 440
 TARGET_RECOVERY_UI_MARGIN_HEIGHT := 165
 
+CAMERA_VSYNC_COUNT := 3
+
 include device/google/redbull/BoardConfig-common.mk
 include device/google/redfin-sepolicy/redfin-sepolicy.mk