x86/mtrr: Remove set_all callback from struct mtrr_ops

Instead of using an indirect call to mtrr_if->set_all just call the only
possible target cache_cpu_init() directly. Remove the set_all function
pointer from struct mtrr_ops.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20221102074713.21493-9-jgross@suse.com


Signed-off-by: Borislav Petkov <bp@suse.de>