ASoC: dt-bindings: fsl,mqs: make gpr optional for SM-based SoCs

ASoC: dt-bindings: fsl,mqs: make gpr optional for SM-based SoCs

For SM-based SoCs (i.e. MX95, MX943), GPR configuration is performed by
the SM coprocessor. Thus, GPR is transparent to the software and does not
need to be described in the devicetree. Make it optional.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Link: https://patch.msgid.link/20260126145537.2301-2-laurentiumihalcea111@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>