sunxi: Fix serial console for A10s-OLinuXino-MICRO

On this board CONFIG_CONS_INDEX needs to be 1 unlike other sun5i
boards.  Since this is the default, remove to bogus setting.

Fixes: 7095f8641863 ("sunxi: Convert CONS_INDEX to Kconfig")
Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/configs/A10s-OLinuXino-M_defconfig b/configs/A10s-OLinuXino-M_defconfig
index 99f5785..d1e3b05 100644
--- a/configs/A10s-OLinuXino-M_defconfig
+++ b/configs/A10s-OLinuXino-M_defconfig
@@ -16,6 +16,5 @@
 CONFIG_MII=y
 CONFIG_SUN4I_EMAC=y
 CONFIG_AXP152_POWER=y
-CONFIG_CONS_INDEX=2
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_OHCI_HCD=y