spi: npcm: fix u32 csgpio being checked for less than zero

The u32 variable csgpio is being checked for an error return
from the call to of_get_named_gpio, however, since this is unsigned
this comparison will always be false. Fix this by making csgpio an
int and fix up the %u format specifiers to %d accordingly.

Detected by CoverityScan, CID#1475476 ("Unsigned compared against 0")

Fixes: 2a22f1b30c ("spi: npcm: add NPCM PSPI controller driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-npcm-pspi.c

@@ -329,7 +329,7 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 	unsigned long clk_hz;
 	struct device_node *np = pdev->dev.of_node;
 	int num_cs, i;
-	u32 csgpio;
+	int csgpio;
 	int irq;
 	int ret;
 
@@ -417,12 +417,12 @@ static int npcm_pspi_probe(struct platform_device *pdev)
 			dev_err(&pdev->dev, "failed to get csgpio#%u\n", i);
 			goto out_disable_clk;
 		}
-		dev_dbg(&pdev->dev, "csgpio#%u = %u\n", i, csgpio);
+		dev_dbg(&pdev->dev, "csgpio#%u = %d\n", i, csgpio);
 		ret = devm_gpio_request_one(&pdev->dev, csgpio,
 					    GPIOF_OUT_INIT_HIGH, DRIVER_NAME);
 		if (ret < 0) {
 			dev_err(&pdev->dev,
-				"failed to configure csgpio#%u %u\n"
+				"failed to configure csgpio#%u %d\n"
 				, i, csgpio);
 			goto out_disable_clk;
 		}