ARM: dts: ls1021a: fix rcpm failed to claim resource

The range of dcfg reg is wrong, which overlap with other device,
such as rcpm. This issue causing rcpm driver failed to claim
reg resource when calling devm_ioremap_resource().

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>