kernel: fix OHCI and EHCI modules for AT91

We were not copying the additional files needed to get USB to work on
the AT91 platforms, make sure we do this.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46172 3c298f89-4303-0410-b956-a3cf2f4a3e73