net: ti: am65-cpsw-nuss: Remove dead code

MDIO node is not referenced further, therefore drop the dead code.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
diff --git a/drivers/net/ti/am65-cpsw-nuss.c b/drivers/net/ti/am65-cpsw-nuss.c
index 85f3e49..e8fe875 100644
--- a/drivers/net/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ti/am65-cpsw-nuss.c
@@ -746,13 +746,6 @@
 		goto out;
 	}
 
-	node = dev_read_subnode(dev, "mdio");
-	if (!ofnode_valid(node)) {
-		dev_err(dev, "can't find mdio\n");
-		ret = -ENOENT;
-		goto out;
-	}
-
 	cpsw_common->bus_freq =
 			dev_read_u32_default(dev, "bus_freq",
 					     AM65_CPSW_MDIO_BUS_FREQ_DEF);