[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/mm/alignment.c b/arch/arm/mm/alignment.c
index 19ca333..36440c8 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -3,7 +3,7 @@
  *
  *  Copyright (C) 1995  Linus Torvalds
  *  Modifications for ARM processor (c) 1995-2001 Russell King
- *  Thumb aligment fault fixups (c) 2004 MontaVista Software, Inc.
+ *  Thumb alignment fault fixups (c) 2004 MontaVista Software, Inc.
  *  - Adapted from gdb/sim/arm/thumbemu.c -- Thumb instruction emulation.
  *    Copyright (C) 1996, Cygnus Software Technologies Ltd.
  *