remove pcmcia and usb backport form compat.ko
If an with usb or pcmcia module not directly included into the image is build all wireless packages depend on usb and pcmcia.
This hopefully fixes#6586
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19389 3c298f89-4303-0410-b956-a3cf2f4a3e73
