x86: corruption-check: some post-move cleanups

Impact: cleanup

now that the code is moved and converted to a work queue,
there's some minor cleanups that can be done.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --cc arch/x86/kernel/Makefile
Simple merge

diff --cc arch/x86/kernel/check.c
Simple merge