fix gpio function calls

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@23007 52c4871e-980c-0410-b1e0-e73912ce01f8
missing header

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@23008 52c4871e-980c-0410-b1e0-e73912ce01f8