blk: Rename if_type to uclass_id

Use the word 'uclass' instead of 'if_type' to complete the conversion.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/net/fsl_enetc.h b/drivers/net/fsl_enetc.h
index 69f2f4a..f2acf36 100644
--- a/drivers/net/fsl_enetc.h
+++ b/drivers/net/fsl_enetc.h
@@ -158,7 +158,7 @@
 	struct bd_ring tx_bdr;
 	struct bd_ring rx_bdr;
 
-	int if_type;
+	int uclass_id;
 	struct mii_dev imdio;
 	struct phy_device *phy;
 };