x86: some whitespace cleanups in paging code

This patch does some whitespace cleanups in the paging code to fix some
checkpatch.pl warnings of my formerly merged cleanup patches.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>