s390/spinlock: remove align attribute from arch_spinlock_t

No need to add an align attribute for an integer.
The alignment is correct anyway.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/spinlock_types.h

@@ -8,7 +8,7 @@
 
 typedef struct {
 	int lock;
-} __attribute__ ((aligned (4))) arch_spinlock_t;
+} arch_spinlock_t;
 
 #define __ARCH_SPIN_LOCK_UNLOCKED { .lock = 0, }