meta-quanta: gbs: inband bmc/bios image update

gbs-bmc-update and gbs-bios-update packages do
inband bmc/bios image update via Nuvoton PCI mailbox

Tested:
Set PCI mailbox memory space as writable
~# sudo setpci -d 1050:0750 04.B=02

bmc update:
~# sudo burn_my_bmc --command update --interface ipmipci
--image image-bmc --sig image-bmc.sig --type image

bios update:
~# sudo burn_my_bmc --command update --interface ipmipci
--image image-bios --sig image-bios.sig --type bios

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I69df209d74ae8321b8f50b3cd390eca79a41e902
diff --git a/meta-gbs/recipes-gbs/gbs-bios-update/files/phosphor-ipmi-flash-bios-update.service b/meta-gbs/recipes-gbs/gbs-bios-update/files/phosphor-ipmi-flash-bios-update.service
new file mode 100644
index 0000000..a08816a
--- /dev/null
+++ b/meta-gbs/recipes-gbs/gbs-bios-update/files/phosphor-ipmi-flash-bios-update.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Phosphor-ipmi-flash update BIOS service
+
+[Service]
+ExecStart=/usr/bin/bios-update.sh
+Type=oneshot
+
+[Install]
+WantedBy=phosphor-ipmi-flash-bios-update.target