mm/memory.c: trivial clean up in insert_page()

Make the success case use the same cleanup path as the failure case.

Link: http://lkml.kernel.org/r/20190523134024.GC24093@localhost.localdomain


Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>