ARM: dts: imx7s: Avoid using label in unit address and reg

As recommended by Rob Herring [1] labels should not be used in unit address
and reg, so use its real value directly instead.

[1] https://www.spinics.net/lists/devicetree/msg206567.html



Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>