arm64: dts: imx8m: Align SoC unique ID node unit address

Align the SoC unique ID DT node unit address with its reg property.

Reviewed-by: Peng Fan <peng.fan@nxp.com>
Fixes: cbff2379 ("arm64: dts: imx8m: add NVMEM provider and consumer to read soc unique ID")
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>