[ARM] spelling fixes

Spelling fixes in arch/arm/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-s3c2440/mach-osiris.c b/arch/arm/mach-s3c2440/mach-osiris.c
index 324f5a2..4d6c7a5 100644
--- a/arch/arm/mach-s3c2440/mach-osiris.c
+++ b/arch/arm/mach-s3c2440/mach-osiris.c
@@ -45,7 +45,7 @@
 #include <asm/plat-s3c24xx/devs.h>
 #include <asm/plat-s3c24xx/cpu.h>
 
-/* onboard perihpheral map */
+/* onboard perihperal map */
 
 static struct map_desc osiris_iodesc[] __initdata = {
   /* ISA IO areas (may be over-written later) */