spi: spidev: Add support for Octal mode data transfers

Include the flags for Octal mode data transfers in the mask, so
userspace can set them.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200416101835.14573-2-geert+renesas@glider.be
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spidev.c

@@ -62,7 +62,8 @@ static DECLARE_BITMAP(minors, N_SPI_MINORS);
 #define SPI_MODE_MASK		(SPI_CPHA | SPI_CPOL | SPI_CS_HIGH \
 				| SPI_LSB_FIRST | SPI_3WIRE | SPI_LOOP \
 				| SPI_NO_CS | SPI_READY | SPI_TX_DUAL \
-				| SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD)
+				| SPI_TX_QUAD | SPI_TX_OCTAL | SPI_RX_DUAL \
+				| SPI_RX_QUAD | SPI_RX_OCTAL)
 
 struct spidev_data {
 	dev_t			devt;