sh: Fix up switch_to() type casts.

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

include/asm-sh/system_32.h

@@ -11,11 +11,11 @@ struct task_struct *__switch_to(struct task_struct *prev,
  */
 #define switch_to(prev, next, last)					\
 do {									\
-	register u32 *__ts1 __asm__ ("r1") = &prev->thread.sp;	\
-	register u32 *__ts2 __asm__ ("r2") = &prev->thread.pc;	\
+	register u32 *__ts1 __asm__ ("r1") = (u32 *)&prev->thread.sp;	\
+	register u32 *__ts2 __asm__ ("r2") = (u32 *)&prev->thread.pc;	\
 	register u32 *__ts4 __asm__ ("r4") = (u32 *)prev;		\
 	register u32 *__ts5 __asm__ ("r5") = (u32 *)next;		\
-	register u32 *__ts6 __asm__ ("r6") = &next->thread.sp;	\
+	register u32 *__ts6 __asm__ ("r6") = (u32 *)&next->thread.sp;	\
 	register u32 __ts7 __asm__ ("r7") = next->thread.pc;		\
 	struct task_struct *__last;					\
 									\