[package]: uboot-imx23: add new package for i.MX233 boards



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37822 3c298f89-4303-0410-b956-a3cf2f4a3e73
imx23: add support for u-boot image build



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37823 3c298f89-4303-0410-b956-a3cf2f4a3e73
imx23: bump kernel to 3.10.9



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37824 3c298f89-4303-0410-b956-a3cf2f4a3e73