spi: fspi: involve lut_num for struct nxp_fspi_devtype_data

The flexspi on different SoCs may have different number of LUTs.
So involve lut_num in nxp_fspi_devtype_data to make distinguish.
This patch prepare for the adding of imx8ulp.

Fixes: ef89fd56 ("arm64: dts: imx8ulp: add flexspi node")
Cc: stable@kernel.org
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20240905094338.1986871-3-haibo.chen@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>