wndr4500 / r6300 suport, fix typo in password change page and nvram erase for for e900

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21606 52c4871e-980c-0410-b1e0-e73912ce01f8
Upgrade kernel

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21607 52c4871e-980c-0410-b1e0-e73912ce01f8
usb power, reset button and wireless button

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21608 52c4871e-980c-0410-b1e0-e73912ce01f8
load drivers for wndr4500/r6300

git-svn-id: svn://svn.dd-wrt.com/DD-WRT@21609 52c4871e-980c-0410-b1e0-e73912ce01f8