spelling: s/retreive/retrieve/

Signed-off-by: Adrian Bunk <bunk@stusta.de>

scripts/mksysmap

diff --git a/scripts/mksysmap b/scripts/mksysmap
index a6430e0..4390fab 100644
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -1,7 +1,7 @@
 #!/bin/sh -x
 # Based on the vmlinux file create the System.map file
 # System.map is used by module-init tools and some debugging
-# tools to retreive the actual addresses of symbols in the kernel.
+# tools to retrieve the actual addresses of symbols in the kernel.
 #
 # Usage
 # mksysmap vmlinux System.map