spi: mpc512x-psc: Fix compile errors

My patch created compilation bugs in the MPC512x-PSC driver.
Fix them up.

Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: linuxppc-dev@lists.ozlabs.org
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 2818824c (" spi: mpc512x-psc: Convert to use GPIO descriptors")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20220201234535.569973-1-linus.walleij@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-mpc512x-psc.c

@@ -127,7 +127,7 @@ static void mpc512x_psc_spi_activate_cs(struct spi_device *spi)
 	out_be32(psc_addr(mps, ccr), ccr);
 	mps->bits_per_word = cs->bits_per_word;
 
-	if (cs->gpiod) {
+	if (spi->cs_gpiod) {
 		if (mps->cs_control)
 			/* boardfile override */
 			mps->cs_control(spi, (spi->mode & SPI_CS_HIGH) ? 1 : 0);
@@ -373,7 +373,6 @@ static int mpc512x_psc_spi_unprep_xfer_hw(struct spi_master *master)
 static int mpc512x_psc_spi_setup(struct spi_device *spi)
 {
 	struct mpc512x_psc_spi_cs *cs = spi->controller_state;
-	int ret;
 
 	if (spi->bits_per_word % 8)
 		return -EINVAL;