dt-bindings: memory-controllers: fsl,ifc: split child node differences

dt-bindings: memory-controllers: fsl,ifc: split child node differences

ifc can connect nor, nand and fpag. Split "^.*@..." into "nand@..." and
"(flash|fpga|board-control|cpld)@..." to better describe the child's node
binding requirements.

Fix below warning:
arch/arm64/boot/dts/freescale/fsl-ls1043a-qds.dtb: /soc/memory-controller@1530000/nand@1,0:
	failed to match any schema with compatible: ['fsl,ifc-nand']

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20240909165358.2384975-1-Frank.Li@nxp.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>