mxs: bump kernel to 3.12
 - remove DCP patch as it's in mainline now (dts patch will stay)
 - refresh Duckbill patch
 - update kmod-usb-chipidea

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38780 3c298f89-4303-0410-b956-a3cf2f4a3e73