intel: Rename GENx prefix in macros to GFXx in source files

Commands used to do the changes:
export SEARCH_PATH="src/intel src/gallium/drivers/iris src/mesa/drivers/dri/i965"
grep -E "GEN" -rIl src/intel/genxml | grep -E ".*py" |  xargs sed -ie "s/GEN\([%{]\)/GFX\1/g"
grep -E "[^_]GEN[[:digit:]]+" -rIl $SEARCH_PATH | grep -E ".*(\.c|\.h|\.y|\.l)" | xargs sed -ie "s/\([^_]\)GEN\([[:digit:]]\+\)/\1GFX\2/g"

Leave out renaming GFX12_CCS_E macros. They fall under renaming pattern like "_GEN[[:digit:]]+":
grep -E "GFX12_CCS_E" -rIl $SEARCH_PATH | xargs sed -ie "s/GFX12_CCS_E/GEN12_CCS_E/g"

Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9936>

src/intel/compiler/brw_fs.h

@@ -379,7 +379,7 @@ public:
    fs_reg outputs[VARYING_SLOT_MAX];
    fs_reg dual_src_output;
    int first_non_payload_grf;
-   /** Either BRW_MAX_GRF or GEN7_MRF_HACK_START */
+   /** Either BRW_MAX_GRF or GFX7_MRF_HACK_START */
    unsigned max_grf;
 
    fs_reg *nir_locals;