More battery updates, this time for gigabeat. FS #7433 from Johnathon Mihalop

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13891 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 531f92d..69804bc 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -305,6 +305,7 @@
 Michael Giacomelli
 Alex Wenger
 Andree Buschmann
+Johnathon Mihalop
 The libmad team
 The wavpack team
 The ffmpeg team