phy: qcom-ufs: Catch devm_phy_create failure in ufs_qcom_phy_generic_probe

Current code does NULL test against return value of ufs_qcom_phy_generic_probe.
However, in the case of devm_phy_create() failure, ufs_qcom_phy_generic_probe
does not return NULL. Fix it.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Kishon Vijay Abraham I <[e-mail]>

drivers/phy/phy-qcom-ufs.c

···
 	if (IS_ERR(generic_phy)) {
 		err =  PTR_ERR(generic_phy);
 		dev_err(dev, "%s: failed to create phy %d\n", __func__, err);
+		generic_phy = NULL;
 		goto out;
 	}