meta-bletchley: add usb-controller-update tool

Add usb-controller-update script for firmware updating.

Tested results:

root@bletchley:~# systemctl start flash-usb-controller@3.service
root@bletchley:~# systemctl status flash-usb-controller@3.service
○ flash-usb-controller@3.service - Flash usb controller image on SLED 3
     Loaded: loaded (/lib/systemd/system/flash-usb-controller@.service; static)
     Active: inactive (dead)

Apr 22 02:52:52 bletchley systemd[1]: Starting Flash usb controller image on SLED 3...
Apr 22 02:52:54 bletchley usb-controller-update[3915]: Bind mtd node success, path: /dev/mtd7
Apr 22 02:53:01 bletchley usb-controller-update[3937]: [293B blob data]
Apr 22 02:53:01 bletchley usb-controller-update[3915]: Erase flash block done
Apr 22 02:53:08 bletchley usb-controller-update[3940]: [438B blob data]
Apr 22 02:53:10 bletchley usb-controller-update[3940]: [293B blob data]
Apr 22 02:53:11 bletchley usb-controller-update[3940]: [293B blob data]
Apr 22 02:53:11 bletchley usb-controller-update[3915]: Write firmware image done
Apr 22 02:53:12 bletchley systemd[1]: flash-usb-controller@3.service: Deactivated successfully.
Apr 22 02:53:12 bletchley systemd[1]: Finished Flash usb controller image on SLED 3.

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: Icd26fb3c7585461152c3b929a46dc16675d6c937
diff --git a/meta-facebook/meta-bletchley/recipes-phosphor/images/fb-bletchley-phosphor-image.inc b/meta-facebook/meta-bletchley/recipes-phosphor/images/fb-bletchley-phosphor-image.inc
index 721861e..7929a0a 100644
--- a/meta-facebook/meta-bletchley/recipes-phosphor/images/fb-bletchley-phosphor-image.inc
+++ b/meta-facebook/meta-bletchley/recipes-phosphor/images/fb-bletchley-phosphor-image.inc
@@ -5,4 +5,5 @@
     phosphor-virtual-sensor \
     usbutils \
     idevicerestore \
+    fw-update \
 "