uboot-sunxi: cosmetic changes

This will ease adding new targets and updating:
 * split UBOOTS var into multiple lines
 * remove version from TITLE

Signed-off-by: Nicolas Thill <nico@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43187 3c298f89-4303-0410-b956-a3cf2f4a3e73
uboot-sunxi: add support for Olimex A20-OLinuXino-LIME

Signed-off-by: Nicolas Thill <nico@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43188 3c298f89-4303-0410-b956-a3cf2f4a3e73
sunxi: add support for Olimex A20-OLinuXino-LIME

Signed-off-by: Nicolas Thill <nico@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43189 3c298f89-4303-0410-b956-a3cf2f4a3e73