camera: Add NV12_VENUS image format

Add NV12_VENUS image format for backward compatibility with HAL1

Change-Id: Ib2d96b4d66bcc509d26c32dccaeadee3c31cbce5
diff --git a/camera/QCamera2/stack/common/cam_types.h b/camera/QCamera2/stack/common/cam_types.h
index 04297b0..7acf4c5 100644
--- a/camera/QCamera2/stack/common/cam_types.h
+++ b/camera/QCamera2/stack/common/cam_types.h
@@ -77,6 +77,7 @@
     CAM_FORMAT_YUV_420_YV12,
     CAM_FORMAT_YUV_422_NV16,
     CAM_FORMAT_YUV_422_NV61,
+    CAM_FORMAT_YUV_420_NV12_VENUS,
 
     /* Please note below are the defintions for raw image.
      * Any format other than raw image format should be declared