Don't call kfree on mii->irq

mii->irq is a static array.
diff --git a/drivers/qtn/ruby/emac_lib.c b/drivers/qtn/ruby/emac_lib.c
index 8e25071..43b4f47 100644
--- a/drivers/qtn/ruby/emac_lib.c
+++ b/drivers/qtn/ruby/emac_lib.c
@@ -730,9 +730,6 @@
 			rtl8367b_exit();
 		}
 #endif
-		if (mii->irq) {
-			kfree(mii->irq);
-		}
 		if ((privc->emac_cfg & EMAC_PHY_NOT_IN_USE) == 0)
 			mdiobus_unregister(mii);
 		mdiobus_free(mii);