staging: sm750fb: disable PCI device if lynxfb_pci_probe fails

In case of error during lynxfb_pci_probe, the function returned without
calling pci_disable_device. Fix it by adding pci_disable_device on the
error cleanup path.
Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/sm750.c

@@ -1132,6 +1132,7 @@ static int lynxfb_pci_probe(struct pci_dev *pdev,
 err_map:
 	kfree(sm750_dev);
 err_share:
+	pci_disable_device(pdev);
 err_enable:
 	return -ENODEV;
 }