ARM: configs: sunxi: Enable Cedrus

Let's enable the staging related options and Cedrus in our defconfig.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20200705091904.42795-4-maxime@cerno.tech


Acked-by: Chen-Yu Tsai <wens@csie.org>