s390/pgtable: add unsigned long casts

Get rid of warnings like this one:
warning: constant 0xffe0000000000000 is so big it is unsigned long

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Heiko Carstens 2014-12-12 13:04:21 +01:00 • committed by Martin Schwidefsky
commit 925dfc020a