arm: dts: fsl-ls1088a: move and sync existing bindings to be under /soc

arm: dts: fsl-ls1088a: move and sync existing bindings to be under /soc

Our [U-Boot] copy of fsl-ls1088a.dtsi had all the hardware under
the top level, until the DM_SERIAL implementation recently.

In this commit, remove any remaining devices (that were in U-Boot,
but not touched by previous patches in this series) to be under /soc,
updating to their upstream (Linux) bindings.

The bindings have been copied closest to their relative positions
in the Linux version, so the eventual result is that the U-Boot
and Linux fsl-ls1088a.dtsi will be identical.

The next commit will add the hardware bindings that were not
in U-Boot.

Signed-off-by: Mathew McBride <matt@traverse.com.au>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com> # on LS1088A-RDB