spi: spi-fsl-dspi: Add config and regmaps for S32G platforms

spi: spi-fsl-dspi: Add config and regmaps for S32G platforms

S32G adds SPI_{T,R}XFR4 and extends SPI_CTAR registers to 5. Add the
new regmaps, configs and bits.

dspi_volatile_ranges gets SPI_{T,R}XFR4 added which affects all
platforms, however they are further limited by dspi_yes_ranges.

Signed-off-by: Larisa Grigore <larisa.grigore@nxp.com>
Signed-off-by: James Clark <james.clark@linaro.org>
Link: https://patch.msgid.link/20250522-james-nxp-spi-v2-6-bea884630cfb@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>