sunxi: convert to new image generation method

The new Device/xxx were transformed automatically from old profiles.

Most device names are now taken from basename of the corresponding
kernel device tree file.  Device/sun5i-a13-olimex-som is an exception
because it is not explicitly supported in the kernel yet and shares the
same dts file with Device/sun5i-a13-olinuxino

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>