mm/highmem.c: fix coding style issue

Delete/add some blank lines and some blank spaces

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: songqiang <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
1 file changed