Only A23/A33 in SUN8I want a default value of CONS_INDEX of 5, for other
chips the default value is 1 like other Allwinner SoCs.

Fix this default value.

The original wrong value has lead to wrong console on H3 Orange Pi
boards.

Fixes: 7095f864 ("sunxi: Convert CONS_INDEX to Kconfig")

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>