gralloc: Change HAL_PIXEL_FORMAT_YCbCr_420_P010 macro

Use value 54 from system include for HAL_PIXEL_FORMAT_YCbCr_420_P010

Change-Id: I5a008141a857f4c7c3e4f116c78553f34030ae2f
Crs-fixed: 2688319
1 file changed