[POWERPC] Typo fixes interrrupt -> interrupt

This fixes some interrrupt -> interrupt typos.

Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/embedded6xx/linkstation.c b/arch/powerpc/platforms/embedded6xx/linkstation.c
index bd5ca58..8c60e02 100644
--- a/arch/powerpc/platforms/embedded6xx/linkstation.c
+++ b/arch/powerpc/platforms/embedded6xx/linkstation.c
@@ -99,7 +99,7 @@
 }
 
 /*
- * Interrupt setup and service.  Interrrupts on the linkstation come
+ * Interrupt setup and service.  Interrupts on the linkstation come
  * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
  */
 static void __init linkstation_init_IRQ(void)