Remove LINUX_2_6 dependency from qc-usb

Remove LINUX_2_6 dependency from qc-usb

This patch removes LINUX_2_6 dependency from qc-usb for those of us who
still have broadcom chipsets as qc-usb works fine on LINUX_2_4 too. This
compiles with both 2.4 and 2.6 kernels selected, and although i do not
have a Kamikaze svn system, the same changes (albeit without the new
package name changes in svn vs 7.09) work fine on my running 2.4 system
with a Quickcam Express card (older model).

Signed-off-by: Misha Koshelev <mk144210 at bcm dot edu>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10123 3c298f89-4303-0410-b956-a3cf2f4a3e73