[PATCH v2] fixes warning

[coolrrsh@gmail.com]

From: Rajeshwar R Shinde <coolrrsh@gmail.com>

Typecasting the interrupt number from "unsigned int" to "signed int" to compare with 0(signed int by default).
Declaring interrupt number as "signed int" would violate kernel standards. So typecasting is the possible approach.
The fix is for spi-mpc52xx.

This fixes warning such as:
drivers/spi/spi-mpc52xx-psc.c:332:5-13: WARNING: Unsigned expression compared with zero: mps -> irq < 0

Signed-off-by: Rajeshwar R Shinde <coolrrsh@gmail.com>
---
 drivers/spi/spi-mpc52xx-psc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-mpc52xx-psc.c b/drivers/spi/spi-mpc52xx-psc.c
index 9a1a080..7452bc9 100644
--- a/drivers/spi/spi-mpc52xx-psc.c
+++ b/drivers/spi/spi-mpc52xx-psc.c
@@ -329,7 +329,7 @@ static int mpc52xx_psc_spi_of_probe(struct platform_device *pdev)
 	mps->fifo = ((void __iomem *)mps->psc) + sizeof(struct mpc52xx_psc);
 
 	mps->irq = platform_get_irq(pdev, 0);
-	if (mps->irq < 0)
+	if ((int)mps->irq < 0)
 		return mps->irq;
 
 	ret = devm_request_irq(dev, mps->irq, mpc52xx_psc_spi_isr, 0,
-- 
2.25.1