dfu: align array in dfu_get_dev_type with enum dfu_device_type

Signed-off-by: Patrick Delaunay <patrick.delaunay73@gmail.com>
diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
index 20dfcbb..8dacc1a 100644
--- a/drivers/dfu/dfu.c
+++ b/drivers/dfu/dfu.c
@@ -482,7 +482,7 @@
 
 const char *dfu_get_dev_type(enum dfu_device_type t)
 {
-	const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM" };
+	const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM", "SF" };
 	return dev_t[t];
 }