sunxi:dma: unify sun[45] dma

Only unification, all changes related headers, moving mach->plat
Signed-off-by: Alexsey Shestacov <wingrime@gmail.com>
sunxi:nand: Add dma operation timeout

In some cases dma operation can hung and that hung all process try
access to that device. Timeout (20 sec) make possible exit from that
but code still need handle such return