staging: rts5208: fix memleaks on error handling paths in probe

rtsx_probe() allocates host, but does not free it on error handling
paths. The patch adds missed scsi_host_put().

Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Link: https://lore.kernel.org/r/20200623141230.7258-1-novikov@ispras.ruSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rts5208/rtsx.c

@@ -972,6 +972,7 @@ static int rtsx_probe(struct pci_dev *pci,
 	kfree(dev->chip);
 chip_alloc_fail:
 	dev_err(&pci->dev, "%s failed\n", __func__);
+	scsi_host_put(host);
 scsi_host_alloc_fail:
 	pci_release_regions(pci);
 	return err;