sh: boards: Fix the cacography in irq.c

The word 'swtich' is wrong, so fix it.

Signed-off-by: Tang Bin <[email protected]>
Reviewed-by: John Paul Adrian Glaubitz <[email protected]>
Signed-off-by: Rich Felker <[email protected]>

Author: Tang Bin

arch/sh/boards/mach-landisk/irq.c

@@ -26,8 +26,8 @@ enum {
 	PCI_INTD, /* PCI int D */
 	ATA,	  /* ATA */
 	FATA,	  /* CF */
-	POWER,	  /* Power swtich */
-	BUTTON,	  /* Button swtich */
+	POWER,	  /* Power switch */
+	BUTTON,	  /* Button switch */
 };
 
 /* Vectors for LANDISK */