add ZTE serial driver

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21864 52c4871e-980c-0410-b1e0-e73912ce01f8
add ZTE serial driver

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21865 52c4871e-980c-0410-b1e0-e73912ce01f8
add ZTE serial driver

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21866 52c4871e-980c-0410-b1e0-e73912ce01f8
for zte modems

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21867 52c4871e-980c-0410-b1e0-e73912ce01f8
always use toolchain libs

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21868 52c4871e-980c-0410-b1e0-e73912ce01f8
remove unused files

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21869 52c4871e-980c-0410-b1e0-e73912ce01f8