sh: processor.h needs smp.h

Trivial build fix for SH-2.

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

include/asm-sh/processor.h

@@ -10,6 +10,7 @@
 #ifdef __KERNEL__
 
 #include <linux/compiler.h>
+#include <linux/smp.h>
 #include <asm/page.h>
 #include <asm/types.h>
 #include <asm/cache.h>