x86: Fix spelling error in the memcpy() source code comment

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: http://lkml.kernel.org/r/201105011409.21629.bvanassche@acm.org


Signed-off-by: Ingo Molnar <mingo@elte.hu>