x86, cleanup: Remove unneeded version.h include from arch/x86/

It was pointed out by 'make versioncheck' that the include of
linux/version.h is not needed in arch/x86/mm/mmio-mod.c .
This patch removes it.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Link: http://lkml.kernel.org/r/alpine.LNX.2.00.1108012305570.31999@swampdragon.chaosbits.net


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>