[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/mpc7448_hpc2.c b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
index 1e3cc69..25c29bc 100644
--- a/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
+++ b/arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c
@@ -91,7 +91,7 @@
 }
 
 /*
- * Interrupt setup and service.  Interrrupts on the mpc7448_hpc2 come
+ * Interrupt setup and service.  Interrupts on the mpc7448_hpc2 come
  * from the four external INT pins, PCI interrupts are routed via
  * PCI interrupt control registers, it generates internal IRQ23
  *