nir-to-tgsi: fix swizzle for double immediate
Use ureg_DECL_immediate_uint64 to declare double immediate, otherwise the swizzle for a double might not be in the valid form, ie. must be either .xy or .zw
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
Use ureg_DECL_immediate_uint64 to declare double immediate, otherwise the swizzle for a double might not be in the valid form, ie. must be either .xy or .zw