drivers: dfu: Remove duplicate newlines

Drop all duplicate newlines. No functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c
index cfa6334..8f7ecfa 100644
--- a/drivers/dfu/dfu_mmc.c
+++ b/drivers/dfu/dfu_mmc.c
@@ -269,7 +269,6 @@
 	}
 }
 
-
 static int mmc_file_buf_read(struct dfu_entity *dfu, u64 offset, void *buf,
 			     long *len)
 {