Rework:
* Split clflushopt into a separate file as recommended by Ken.
If we enable -mclflush on all driver source compilation, then
gcc may insert uses of it on processors that don't support it.
* Add uintptr_t casting to cpu_caps->cacheline usage
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22379>
