x86/bugs: Restructure MDS mitigation

Restructure MDS mitigation selection to use select/update/apply
functions to create consistent vulnerability handling.

  [ bp: rename and beef up comment over VERW mitigation selected var for
    maximum clarity. ]

Signed-off-by: David Kaplan <david.kaplan@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/20250418161721.1855190-2-david.kaplan@amd.com
This commit is contained in:
David Kaplan 2025-04-18 11:17:06 -05:00 • committed by Borislav Petkov (AMD)
commit 559c758bc7