[SPARC32]: Fix syntax errors from smp_{mb,rmb,wmb} on sparc32.

smp_mb(), smp_rmp() and smp_wmb() definitions have a trailing semicolon 
and cause compilation errors in single statement context, like 
if-then-else on line 358 in include/linux/skbuff.h. This patch removes 
all three offending semicolons to make it compile.
Signed-off-by: Meelis Roos <mroos@linux.ee>
Acked-by: William Irwin <wli@holomorphy.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/asm-sparc/system.h

@@ -195,9 +195,9 @@ static inline unsigned long getipl(void)
 #define read_barrier_depends()	do { } while(0)
 #define set_mb(__var, __value)  do { __var = __value; mb(); } while(0)
 #define set_wmb(__var, __value) set_mb(__var, __value)
-#define smp_mb()	__asm__ __volatile__("":::"memory");
-#define smp_rmb()	__asm__ __volatile__("":::"memory");
-#define smp_wmb()	__asm__ __volatile__("":::"memory");
+#define smp_mb()	__asm__ __volatile__("":::"memory")
+#define smp_rmb()	__asm__ __volatile__("":::"memory")
+#define smp_wmb()	__asm__ __volatile__("":::"memory")
 #define smp_read_barrier_depends()	do { } while(0)
 
 #define nop() __asm__ __volatile__ ("nop");