bootindex: rework add_boot_device_path function

Add the function of updating bootindex about fw_boot_order list
in add_boot_device_path(). We should delete the old one if a
device has existed in global fw_boot_order list.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

bootdevice.c

diff --git a/bootdevice.c b/bootdevice.c
index 7167fbc..aac0ffb 100644
--- a/bootdevice.c
+++ b/bootdevice.c
@@ -82,6 +82,8 @@
 
     assert(dev != NULL || suffix != NULL);
 
+    del_boot_device_path(dev, suffix);
+
     node = g_malloc0(sizeof(FWBootEntry));
     node->bootindex = bootindex;
     node->suffix = g_strdup(suffix);