anv/formats: Add surface_format initializer
anv/formats: Add surface_format initializer

v2: Rename __brw_fmt to __hw_fmt (Chad)

Suggested-by: Jason Ekstrand <b186559eaedf698788888c8a2559b4efb4db10d6@intel.com>
Reviewed-by: 4d6eb3af9df6bb7878ab9e1ebf0c3cecbeacbf60@intel.com

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler