Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/arm/mach-sa1100/Makefile b/arch/arm/mach-sa1100/Makefile
index e697691..41252d2 100644
--- a/arch/arm/mach-sa1100/Makefile
+++ b/arch/arm/mach-sa1100/Makefile
@@ -50,7 +50,7 @@
 # LEDs support
 obj-$(CONFIG_LEDS) += $(led-y)
 
-# Miscelaneous functions
+# Miscellaneous functions
 obj-$(CONFIG_PM)			+= pm.o sleep.o
 obj-$(CONFIG_SA1100_SSP)		+= ssp.o