spi: mediatek: advertise the availability of Dual and Quad mode

this patch advertise the availability of Dual and Quad SPI mode
for ipm design.

Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Signed-off-by: Tim.Kuo <Tim.kuo@mediatek.com>
Link: https://lore.kernel.org/r/20230523112608.10298-1-qii.wang@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Qii Wang

drivers/spi/spi-mt65xx.c

@@ -1144,7 +1144,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	if (mdata->dev_comp->must_tx)
 		master->flags = SPI_MASTER_MUST_TX;
 	if (mdata->dev_comp->ipm_design)
-		master->mode_bits |= SPI_LOOP;
+		master->mode_bits |= SPI_LOOP | SPI_RX_DUAL | SPI_TX_DUAL |
+				     SPI_RX_QUAD | SPI_TX_QUAD;
 
 	if (mdata->dev_comp->ipm_design) {
 		mdata->dev = dev;