net: ravb: Drop use of miiphy_get_dev_by_name()

Instead of doing another lookup, trivially access the struct mii_dev
embedded in struct bb_miiphy_bus . No functional change.

Reviewed-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/net/ravb.c b/drivers/net/ravb.c
index 8678718..b790de9 100644
--- a/drivers/net/ravb.c
+++ b/drivers/net/ravb.c
@@ -591,7 +591,7 @@
 	if (ret < 0)
 		goto err_mdio_register;
 
-	eth->bus = miiphy_get_dev_by_name(dev->name);
+	eth->bus = &bb_miiphy->mii;
 
 	/* Bring up PHY */
 	ret = clk_enable_bulk(&eth->clks);