blk: Drop unnecessary #ifdef in in blk_legacy

We can rely on the compiler to eliminate any dead code.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/block/blk_legacy.c b/drivers/block/blk_legacy.c
index df9a359..bd8a17d 100644
--- a/drivers/block/blk_legacy.c
+++ b/drivers/block/blk_legacy.c
@@ -70,7 +70,6 @@
 	return drv->get_dev(devnum, descp);
 }
 
-#ifdef CONFIG_HAVE_BLOCK_DEVICE
 int blk_list_part(enum if_type if_type)
 {
 	struct blk_driver *drv;
@@ -174,7 +173,6 @@
 
 	return 0;
 }
-#endif /* CONFIG_HAVE_BLOCK_DEVICE */
 
 struct blk_desc *blk_get_devnum_by_type(enum if_type if_type, int devnum)
 {