blk: Correct comment for blk_get_devnum_by_uclass_idname()

Update the comment to match the function. Fix the indentation while we
are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>

include/blk.h

@@ -650,7 +650,7 @@ struct blk_driver *blk_driver_lookup_type(int uclass_id);
 struct blk_desc *blk_get_devnum_by_uclass_id(enum uclass_id uclass_id, int devnum);
 
 /**
- * blk_get_devnum_by_uclass_id() - Get a block device by type name, and number
+ * blk_get_devnum_by_uclass_idname() - Get block device by type name and number
  *
  * This looks up the block device type based on @uclass_idname, then calls
  * blk_get_devnum_by_uclass_id().
@@ -660,7 +660,7 @@ struct blk_desc *blk_get_devnum_by_uclass_id(enum uclass_id uclass_id, int devnu
  * Return: point to block device descriptor, or NULL if not found
  */
 struct blk_desc *blk_get_devnum_by_uclass_idname(const char *uclass_idname,
-					    int devnum);
+						 int devnum);
 
 /**
  * blk_dselect_hwpart() - select a hardware partition