sunxi: Disable R_I2C for Libre Computer Board ALL-H3-CC H3 ver.

The Libre Computer Board ALL-H3-CC does not have an I2C controllable
regulator. Having R_I2C and SPL_I2C enabled serves no purpose.

Disable them.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>