net: ks8851: Follow renaming of SPI "master" to "controller"

In commit 8caab75f ("spi: Generalize SPI "master" to "controller"")
some functions and struct members were renamed. To not break all drivers
compatibility macros were provided.

To be able to remove these compatibility macros push the renaming into
this driver.
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/4f26761c0c86072a084b2a20439da1d0a681b07b.1707324794.git.u.kleine-koenig@pengutronix.deSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/net/ethernet/micrel/ks8851_spi.c

@@ -156,7 +156,7 @@ static void ks8851_rdreg(struct ks8851_net *ks, unsigned int op,
 
 	txb[0] = cpu_to_le16(op | KS_SPIOP_RD);
 
-	if (kss->spidev->master->flags & SPI_CONTROLLER_HALF_DUPLEX) {
+	if (kss->spidev->controller->flags & SPI_CONTROLLER_HALF_DUPLEX) {
 		msg = &kss->spi_msg2;
 		xfer = kss->spi_xfer2;
 
@@ -180,7 +180,7 @@ static void ks8851_rdreg(struct ks8851_net *ks, unsigned int op,
 	ret = spi_sync(kss->spidev, msg);
 	if (ret < 0)
 		netdev_err(ks->netdev, "read: spi_sync() failed\n");
-	else if (kss->spidev->master->flags & SPI_CONTROLLER_HALF_DUPLEX)
+	else if (kss->spidev->controller->flags & SPI_CONTROLLER_HALF_DUPLEX)
 		memcpy(rxb, trx, rxl);
 	else
 		memcpy(rxb, trx + 2, rxl);