dt-bindings: spi: nxp-fspi: add imx8ulp support

dt-bindings: spi: nxp-fspi: add imx8ulp support

commit 12736adc43b7cd5cb83f274f8f37b0f89d107c97 upstream.

The flexspi on imx8ulp only has 16 number of LUTs, it is different
with flexspi on other imx SoC which has 32 number of LUTs.

Fixes: ef89fd56bdfc ("arm64: dts: imx8ulp: add flexspi node")
Cc: stable@kernel.org
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20240905094338.1986871-2-haibo.chen@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>