spelling fixes: arch/i386/

Spelling fixes in arch/i386/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/arch/x86/mach-default/setup.c b/arch/x86/mach-default/setup.c
index 47207ca..0c28a07 100644
--- a/arch/x86/mach-default/setup.c
+++ b/arch/x86/mach-default/setup.c
@@ -108,7 +108,7 @@
  * mca_nmi_hook - hook into MCA specific NMI chain
  *
  * Description:
- *	The MCA (Microchannel Arcitecture) has an NMI chain for NMI sources
+ *	The MCA (Microchannel Architecture) has an NMI chain for NMI sources
  *	along the MCA bus.  Use this to hook into that chain if you will need
  *	it.
  **/