spelling fixes: arch/m68k/

Spelling fixes in arch/m68k/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index d5cac72..8df270e 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -1,7 +1,7 @@
 /*
  *	6522 Versatile Interface Adapter (VIA)
  *
- *	There are two of these on the Mac II. Some IRQ's are vectored
+ *	There are two of these on the Mac II. Some IRQs are vectored
  *	via them as are assorted bits and bobs - eg RTC, ADB.
  *
  * CSA: Motorola seems to have removed documentation on the 6522 from