Revert "sunxi: Pine64: temporarily remove extra Pine64 non-plus DT"

Now with the MMC environment gone, we have enough space to accommodate
the Pine64 "non-plus" .dtb again.

This reverts commit 47952b8e

.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>