sh: Fix path of irqflags.h

This changes path of irqflags.h from linux/ to asm/.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/sh/include/asm/system.h

@@ -8,7 +8,7 @@
  * from linux kernel code.
  */
 
-#include <linux/irqflags.h>
+#include <asm/irqflags.h>
 #include <asm/types.h>
 
 /*