update-vendor-firmware: replace == with =

Signed-off-by: dkwo <[email protected]>

Author: dkwo

update-vendor-firmware

@@ -49,7 +49,7 @@ cd "$TARGET_ROOT/$TARGET"
 if [ -e "$TARGET_MANIFEST" ]; then
     h_cur=$(sha1sum "$TARGET_MANIFEST" | cut -d" " -f1)
     h_new=$(sha1sum "$VENDORFW/manifest.txt" | cut -d" " -f1)
-    if [ "$h_cur" == "$h_new" ]; then
+    if [ "$h_cur" = "$h_new" ]; then
         echo "Vendor firmware is up to date, nothing to do."
         $umount && umount /run/.system-efi
         exit 0