net: dwc_eth_qos: Pass -1 to phy_connect() to scan for all PHYs

PHY address 0 is a valid PHY address, to scan for all PHYs, pass -1 to
phy_connect(). Passing 0 used to work before be accident, but does no
longer.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index da5b696..4632111 100644
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -1045,7 +1045,7 @@
 	 * don't need to reconnect/reconfigure again
 	 */
 	if (!eqos->phy) {
-		eqos->phy = phy_connect(eqos->mii, 0, dev,
+		eqos->phy = phy_connect(eqos->mii, -1, dev,
 					eqos->config->interface(dev));
 		if (!eqos->phy) {
 			pr_err("phy_connect() failed");