configurations: add bletchley frontpanel configuration

1. Add a frontpanel configuration for bletchley and move HDC1080
   sensors to frontpanel.
2. Add 2nd source frontpanel config, use Model property in
   xyz.openbmc_project.Inventory.Decorator.Asset for proboing correct
   config.

Tested on bletchley:
- Main source (HDC1080)
```
root@bletchley:~# cat /var/configuration/system.json \
> | grep "Bletchley_FPB"
            "xyz.openbmc_project.Inventory.Decorator.Asset({'Model': 'Bletchley_FPB_HDC1080'})"
root@bletchley:~# busctl get-property xyz.openbmc_project.Settings \
> /xyz/openbmc_project/inventory/system/chassis/frontpanel \
> xyz.openbmc_project.Inventory.Decorator.Asset Model
s "Bletchley_FPB_HDC1080"
root@bletchley:~# busctl get-property xyz.openbmc_project.HwmonTempSensor \
> /xyz/openbmc_project/sensors/temperature/FRONT_PANEL_TEMP \
> xyz.openbmc_project.Sensor.Value Value
d 27.3334
```

- 2nd source (SI7021)
```
root@bletchley:~# cat /var/configuration/system.json \
> | grep "Bletchley_FPB"
            "xyz.openbmc_project.Inventory.Decorator.Asset({'Model': 'Bletchley_FPB_SI7021'})"
root@bletchley:~# busctl get-property xyz.openbmc_project.Settings \
> /xyz/openbmc_project/inventory/system/chassis/frontpanel \
> xyz.openbmc_project.Inventory.Decorator.Asset Model
s "Bletchley_FPB_SI7021"
root@bletchley:~# busctl get-property xyz.openbmc_project.HwmonTempSensor \
> /xyz/openbmc_project/sensors/temperature/FRONT_PANEL_TEMP \
> xyz.openbmc_project.Sensor.Value Value
d 28.8612
```

Signed-off-by: Potin Lai <potin.lai@quantatw.com>
Change-Id: I40950e876629700afe038d222d00eb6e6bb230f8
diff --git a/meson.build b/meson.build
index 148fd64..ad40c96 100644
--- a/meson.build
+++ b/meson.build
@@ -81,6 +81,7 @@
     'asrock_romed8hm3.json',
     'bletchley_baseboard.json',
     'bletchley_chassis.json',
+    'bletchley_frontpanel.json',
     'blyth.json',
     'ahw1um2riser.json',
     'aspower_u1a-d10550_psu.json',