spi: spidev: add two new spi mode bits

Allow userspace to set SPI_MOSI_IDLE_LOW and the SPI_3WIRE_HIZ mode bit
using the SPI_IOC_WR_MODE32 ioctl.

Signed-off-by: Boerge Struempfel <boerge.struempfel@gmail.com>
Link: https://lore.kernel.org/r/20230530141641.1155691-4-boerge.struempfel@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: BoergeSt

drivers/spi/spidev.c

@@ -64,7 +64,8 @@ static_assert(N_SPI_MINORS > 0 && N_SPI_MINORS <= 256);
 				| SPI_NO_CS | SPI_READY | SPI_TX_DUAL \
 				| SPI_TX_QUAD | SPI_TX_OCTAL | SPI_RX_DUAL \
 				| SPI_RX_QUAD | SPI_RX_OCTAL \
-				| SPI_RX_CPHA_FLIP)
+				| SPI_RX_CPHA_FLIP | SPI_3WIRE_HIZ \
+				| SPI_MOSI_IDLE_LOW)
 
 struct spidev_data {
 	dev_t			devt;