spi: spi-fsl-lpspi: fsl_lpspi_set_cmd(): use mode from struct fsl_lpspi_data::config...

spi: spi-fsl-lpspi: fsl_lpspi_set_cmd(): use mode from struct fsl_lpspi_data::config::mode

Commit 7ae4d097b752 ("spi: spi-fsl-lpspi: Handle clock polarity and phase")
enhances the driver with clock polarity and phase handling. That commit
adds a 2nd argument ("struct spi_device *spi") to the fsl_lpspi_set_cmd()
function.

The "spi" pointer is used to access the "mode" of the current transfer.
However the mode is already available via "fsl_lpspi->config.mode".

To simplify the driver remove the 2nd argument and use
"fsl_lpspi->config.mode" to access the mode.

Cc: Marek Vasut <marex@nabladev.com>
Reviewed-by: Marek Vasut <marex@nabladev.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://patch.msgid.link/20260319-spi-fsl-lpspi-cleanups-v2-4-02b56c5d44a8@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>