more misc typo fixes

Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/mm/Kconfig b/mm/Kconfig
index 5d88489..f10fe51 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -104,7 +104,7 @@
 	def_bool n
 
 #
-# Architectecture platforms which require a two level mem_section in SPARSEMEM
+# Architecture platforms which require a two level mem_section in SPARSEMEM
 # must select this option. This is usually for architecture platforms with
 # an extremely sparse physical address space.
 #