phy: ti: Fix not calling dev_err with a device

`phy` doesn't exist; we need to use `x` instead.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Tested-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/phy/phy-ti-am654.c b/drivers/phy/phy-ti-am654.c
index 6907c1a..cc73760 100644
--- a/drivers/phy/phy-ti-am654.c
+++ b/drivers/phy/phy-ti-am654.c
@@ -318,13 +318,13 @@
 	struct serdes_am654 *phy = dev_get_priv(x->dev);
 
 	if (args->args_count != 2) {
-		dev_err(phy->dev, "Invalid DT PHY argument count: %d\n",
+		dev_err(x->dev, "Invalid DT PHY argument count: %d\n",
 			args->args_count);
 		return -EINVAL;
 	}
 
 	if (args->args[0] != PHY_TYPE_PCIE) {
-		dev_err(phy->dev, "Unrecognized PHY type: %d\n",
+		dev_err(x->dev, "Unrecognized PHY type: %d\n",
 			args->args[0]);
 		return -EINVAL;
 	}