intel/dev: fix macro naming convention in gen_wa_helpers.py

intel/dev: fix macro naming convention in gen_wa_helpers.py

intel_device_info.h tests macros in the form `INTEL_WA_{id}_GFX_VER`.
gen_wa_helpers.py produced macros in the form `INTEL_GFX_VER_WA_{id}`

Change the generated code to follow intel_device_info.h

Fixes: 3c9a8f7a6d2 ("intel/dev: generate helpers to identify platform workarounds")
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21908>