x86/mtrr: Remove unused code

mtrr_centaur_report_mcr() isn't used by anyone, so it can be removed.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20230502120931.20719-17-jgross@suse.com


Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>