intel/genxml: fix raster operation field in blt genxml
This field should be a uint, further changes on top of previous ones in this area Fixes: 4d80ec8f ("intel/genxml: fix raster op fields on gen4/5") Acked-by:Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <!12164> (cherry picked from commit de625ddd)