dt-bindings: gpio: fsl,qoriq-gpio: Add compatible string fsl,ls1046a-gpio

dt-bindings: gpio: fsl,qoriq-gpio: Add compatible string fsl,ls1046a-gpio

Add compatible string for chip ls1046 to fix below warning.
arch/arm64/boot/dts/freescale/fsl-ls1046a-frwy.dtb: /soc/gpio@2300000: failed to match any schema with compatible: ['fsl,ls1046a-gpio', 'fsl,qoriq-gpio']

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240702201724.96681-1-Frank.Li@nxp.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>