intel/fs: Do the grf127 hack on SIMD8 instructions in SIMD16 mode
Previously, we only applied the fix to shaders with a dispatch mode of SIMD8 but the code it relies on for SIMD16 mode only applies to SIMD16 instructions. If you have a SIMD8 instruction in a SIMD16 shader, neither would trigger and the restriction could still be hit. Fixes: 232ed898 "i965/fs: Register allocator shoudn't use grf127..." Reviewed-by:Jose Maria Casanova Crespo <jmcasanova@igalia.com> Reviewed-by:
Kenneth Graunke <kenneth@whitecape.org> (cherry picked from commit b4f0d062)
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