s390/pfault: remove not needed packed and aligned attributes

struct pfault_refbk is naturally packed and aligned; remove not needed
packed and aligned attributes.

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/mm/pfault.c

@@ -37,7 +37,7 @@ struct pfault_refbk {
 	u64 refselmk;
 	u64 refcmpmk;
 	u64 reserved;
-} __attribute__ ((packed, aligned(8)));
+};
 
 static struct pfault_refbk pfault_init_refbk = {
 	.refdiagc = 0x258,