sunxi: Use uart0 as console for Sinlinx SinA33

sunxi: Use uart0 as console for Sinlinx SinA33

On the A33, uart0 is muxed on the PB pins. On SBCs these pins may be
available for use. Such is the case on the Sinlinx SinA33.

Set CONS_INDEX=1 to use uart0 as the console, matching the device tree.

Fixes: c89e84fbd75e ("sunxi: Convert CONS_INDEX to Kconfig")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>