x86/mm/64: Fix an incorrect warning with CONFIG_DEBUG_VM=y, !PCID

I've been staring at the word PCID too long.

Fixes: f13c8e8c58ba ("x86/mm: Reinitialize TLB state on hotplug and resume")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>