[S390] incorrect placement of include.

The include of linux/smp.h needs to be done before the #if that
checks for the compiler version. Seems like fallout from the
inline assembly cleanup patch vs. the directed yield patch.

Signed-off-by: Martin Schwidefsky <[e-mail]>

include/asm-s390/spinlock.h

···
 #ifndef __ASM_SPINLOCK_H
 #define __ASM_SPINLOCK_H
 
-#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
-
 #include <linux/smp.h>
+
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
 
 static inline int
 _raw_compare_and_swap(volatile unsigned int *lock,