copybit: Add support for HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS format.

Currently framework is not returning the correct MDP format
corresponding to HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS format.
Modifying the right format to be returned.

Change-Id: I1862dea6daf6cc90e25492af7bf2e7f3bf6328ec
diff --git a/libcopybit/copybit.cpp b/libcopybit/copybit.cpp
index 0fecd59..0244b52 100644
--- a/libcopybit/copybit.cpp
+++ b/libcopybit/copybit.cpp
@@ -134,7 +134,7 @@
         case HAL_PIXEL_FORMAT_YCbCr_422_SP:  return MDP_Y_CBCR_H2V1;
         case HAL_PIXEL_FORMAT_YCbCr_420_SP:  return MDP_Y_CBCR_H2V2;
         case HAL_PIXEL_FORMAT_YCrCb_420_SP_ADRENO: return MDP_Y_CBCR_H2V2_ADRENO;
-        case HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS: return MDP_Y_CBCR_H2V2_ADRENO;
+        case HAL_PIXEL_FORMAT_YCbCr_420_SP_VENUS: return MDP_Y_CBCR_H2V2_VENUS;
         case HAL_PIXEL_FORMAT_NV12_ENCODEABLE: return MDP_Y_CBCR_H2V2;
     }
     return -1;