wl12xx: Copy firmware from hardware/ti/wlan

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ib4f5a76bca42d9936d7ca257ca77f10f0f02a7ed
Remove nvimport

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I8b1ed0bb3a5d7574f43ba42a4b5762e94ef316ba