allwinner: common: add missing header

Some code in sunxi_common.c requires symbols defined in sunxi_private.h,
so add the header to that file.
It was included via another header before, but let's make this explicit.

Reported-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
1 file changed