sunxi: lcd: Move range from kconfig description to definition.

KConfig has range option, use it instead of notice in the option
descrition.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>