dt-bindings: soc: fsl: Add fsl,ls1028a-reset for reset syscon node

ls1028a has a reset module that includes reboot, reset control word, and
service processor control.

Add platform specific compatible string to fix the below warning.

syscon@1e60000: compatible: 'anyOf' conditional failed, one must be fixed:
        ['syscon'] is too short
        'syscon' is not one of ['al,alpine-sysfabric-service', ...]

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240703-ls_reset_syscon-v1-1-338f41b3902d@nxp.com


Signed-off-by: Rob Herring (Arm) <robh@kernel.org>