Add FortiGate 40F-3G4G (#2882)

* Add FortiGate 40F-3G4G

* Update FG-40F-3G4G.yaml

added extra detail

---------

Co-authored-by: Arne Opdal <arne.opdal@netnordic.com>
Co-authored-by: Harry <Harry@cadby.co.uk>

device-types/Fortinet/FG-40F-3G4G.yaml

@@ -0,0 +1,31 @@
+---
+manufacturer: Fortinet
+model: FortiGate 40F-3G4G
+slug: fortinet-fg-40f-3g4g
+part_number: FG-40F-3G4G
+u_height: 1
+is_full_depth: false
+weight: 1
+weight_unit: kg
+airflow: passive
+console-ports:
+  - name: Console
+    type: rj-45
+power-ports:
+  - name: PS1
+    type: dc-terminal
+    maximum_draw: 14
+    allocated_draw: 12
+interfaces:
+  - name: wan
+    type: 1000base-t
+  - name: wwan
+    type: lte
+  - name: A
+    type: 1000base-t
+  - name: lan1
+    type: 1000base-t
+  - name: lan2
+    type: 1000base-t
+  - name: lan3
+    type: 1000base-t