net: dwc_eth_qos: Return error code when start fails

Return error code when phy_connect fails or no link can be established.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c
index c733974..27be5cf 100644
--- a/drivers/net/dwc_eth_qos.c
+++ b/drivers/net/dwc_eth_qos.c
@@ -812,6 +812,7 @@
 
 		if (!eqos->phy) {
 			pr_err("phy_connect() failed");
+			ret = -ENODEV;
 			goto err_stop_resets;
 		}
 
@@ -839,6 +840,7 @@
 
 	if (!eqos->phy->link) {
 		pr_err("No link");
+		ret = -EAGAIN;
 		goto err_shutdown_phy;
 	}