Fixes the following building error:
../out_src/src/intel/common/intel_common.c:29:4: error: implicit declaration of function 'free' is invalid in C99 [-Werror,-Wimplicit-function-declarat
ion]
free(engine_info);
^
1 error generated.
Fixes: 5b8b4f78 ("intel/dev: Add engine_class_supported_count to intel_device_info")
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29975>