ARM: sunxi-mci: Don't enable dma tx complete interrupts

We don't check for dma_done when writing data (since the dma must be
complete for the write to complete), so there is no need to enable the
dma tx complete interrupt.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: sunxi-mci: Don't make idma-des-size-bits a dt property

It depends solely on the version of the IP, not on board layout, etc. So
use 2 different compatible strings for the 2 different versions and determine
idma-des-size-bits based on that.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>