display-hal: Add support for P010 ubwc format

This patch adds support for handling P010 ubwc format in display-hal
libs.

Change-Id: I1c7489be859a608566240c3b6722c84bb9a468ca
CRs-fixed: 2018756
diff --git a/libgralloc/gralloc_priv.h b/libgralloc/gralloc_priv.h
index 6f42ac2..82fdcdb 100644
--- a/libgralloc/gralloc_priv.h
+++ b/libgralloc/gralloc_priv.h
@@ -121,6 +121,7 @@
 #define HAL_PIXEL_FORMAT_CbYCrY_422_I            0x120
 #define HAL_PIXEL_FORMAT_BGR_888                 0x121
 #define HAL_PIXEL_FORMAT_RAW8                    0x123
+#define HAL_PIXEL_FORMAT_YCbCr_420_P010_UBWC     0x124
 
 #define HAL_PIXEL_FORMAT_INTERLACE               0x180