spi: omap2-mcspi: fix error return code in omap2_mcspi_probe()

Fix to return a negative error code from the error handling
case instead of 0, as returned elsewhere in this function.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c
index b3db461..86d2158 100644
--- a/drivers/spi/spi-omap2-mcspi.c
+++ b/drivers/spi/spi-omap2-mcspi.c
@@ -1293,7 +1293,8 @@
 	pm_runtime_set_autosuspend_delay(&pdev->dev, SPI_AUTOSUSPEND_TIMEOUT);
 	pm_runtime_enable(&pdev->dev);
 
-	if (status || omap2_mcspi_master_setup(mcspi) < 0)
+	status = omap2_mcspi_master_setup(mcspi);
+	if (status < 0)
 		goto disable_pm;
 
 	status = spi_register_master(master);