hw-breakpoints: Remove x86 specific headers from core file

Remove asm/processor.h and asm/debugreg.h as these headers are
not used anymore in the hw-breakpoints core file.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Prasad <prasad@linux.vnet.ibm.com>
LKML-Reference: <1258863695-10464-3-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>