arm64: defconfig: Enable Allwinner i2s driver

Enable Allwinner I2S driver for arm64 defconfig.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20201030144648.397824-14-peron.clem@gmail.com