spi: pxa2xx-pci: Drop redundant NULL check in ->probe()

Since all platforms are using ->setup() function, drop unneeded check.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20220225172350.69797-3-andriy.shevchenko@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-pxa2xx-pci.c

@@ -255,11 +255,9 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
 		return ret;
 
 	c = &spi_info_configs[ent->driver_data];
-	if (c->setup) {
-		ret = c->setup(dev, c);
-		if (ret)
-			return ret;
-	}
+	ret = c->setup(dev, c);
+	if (ret)
+		return ret;
 
 	memset(&spi_pdata, 0, sizeof(spi_pdata));
 	spi_pdata.num_chipselect = c->num_chipselect;