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/board/st/common/stm32mp_dfu.c b/board/st/common/stm32mp_dfu.c
index fa48b2a..0096f71 100644
--- a/board/st/common/stm32mp_dfu.c
+++ b/board/st/common/stm32mp_dfu.c
@@ -37,7 +37,7 @@
 	if (!desc)
 		return;
 
-	name = blk_get_if_type_name(desc->if_type);
+	name = blk_get_uclass_name(desc->uclass_id);
 	devnum = desc->devnum;
 	len = strlen(buf);