Fix YCbCrMetaData Initialization
Fix YCbCrMetaData Initialization

- Simplify initialize procedure.

Signed-off-by: Jiajun Xie <770ae248409867dc2f477d040339d87768e0ad72@amd.com>

googlestadia/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,googlestadia/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc,GPUOpen-Drivers/llpc,googlestadia/llpc,GPUOpen-Drivers/llpc