spi: axi-spi-engine: remove delay from CS assertion

Now that the AXI SPI Engine driver has support for the various CS delays
requested through struct spi_message, we don't need to add a separate
delay to the CS assertion instruction. Otherwise, we end up with longer
than requested delays.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231204-axi-spi-engine-series-2-v1-8-063672323fce@baylibre.com


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