gralloc_priv.h: Adds 10bit compressed HAL pixel format in enum list

VPU and MDSS on MPQ8092 supports the 10 bit compressed pixel format
to reduce the memory access bandwidth

Change-Id: I903c52640120c4bf4252405831b98d1ef92c1572
diff --git a/libgralloc/gralloc_priv.h b/libgralloc/gralloc_priv.h
index f6d244a..b4986b9 100644
--- a/libgralloc/gralloc_priv.h
+++ b/libgralloc/gralloc_priv.h
@@ -110,6 +110,9 @@
     HAL_PIXEL_FORMAT_INTERLACE              = 0x180,
     //v4l2_fourcc('Y', 'U', 'Y', 'L'). 24 bpp YUYV 4:2:2 10 bit per component
     HAL_PIXEL_FORMAT_YCbCr_422_I_10BIT      = 0x4C595559,
+    //v4l2_fourcc('Y', 'B', 'W', 'C'). 10 bit per component. This compressed
+    //format reduces the memory access bandwidth
+    HAL_PIXEL_FORMAT_YCbCr_422_I_10BIT_COMPRESSED = 0x43574259,
 };
 
 /* possible formats for 3D content*/