spi: bcmbca-hsspi: Fix error code in probe() function

This code accidentally returns success instead of a negative error code.

Fixes: a38a2233 ("spi: bcmbca-hsspi: Add driver for newer HSSPI controller")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: William Zhang <william.zhang@broadcom.com>
Link: https://lore.kernel.org/r/Y+zmrNJ9zjNQpzWq@kiliSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcmbca-hsspi.c

@@ -548,7 +548,8 @@ static int bcmbca_hsspi_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(&pdev->dev);
 
-	if (sysfs_create_group(&pdev->dev.kobj, &bcmbca_hsspi_group)) {
+	ret = sysfs_create_group(&pdev->dev.kobj, &bcmbca_hsspi_group);
+	if (ret) {
 		dev_err(&pdev->dev, "couldn't register sysfs group\n");
 		goto out_pm_disable;
 	}