dt-bindings: mmc: fsl,esdhc: add compatible string fsl,ls1021a-esdhc

Add compatible string fsl,ls1021a-esdhc for LS1021a SoC.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250417151300.3570021-1-Frank.Li@nxp.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>