spi/pxa2xx-pci: correct the return value check of pcim_iomap_regions()

The function returns 0 on success and negative errno in case of failure.
Fix this.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index 0a11dcfc..74bc187 100644
--- a/drivers/spi/spi-pxa2xx-pci.c
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -22,7 +22,7 @@
 		return ret;
 
 	ret = pcim_iomap_regions(dev, 1 << 0, "PXA2xx SPI");
-	if (!ret)
+	if (ret)
 		return ret;
 
 	memset(&spi_pdata, 0, sizeof(spi_pdata));