Add FireBrick devices (#1430)

* Add FireBrick devices

* Update FB2900.yaml

Fix whitespace

* Update FB2900.yaml

* Update FB6202.yaml

device-types/FireBrick/FB2900.yaml

+---
+manufacturer: FireBrick
+model: FB2900
+slug: firebrick-fb2900
+part_number: FB2900
+u_height: 1
+is_full_depth: false
+airflow: passive
+power-ports:
+  - name: PSU1
+    type: iec-60320-c8
+    maximum_draw: 15
+interfaces:
+  - name: '1'
+    type: 1000base-t
+  - name: '2'
+    type: 1000base-t
+  - name: '3'
+    type: 1000base-t
+  - name: '4'
+    type: 1000base-t
+  - name: '5'
+    type: 1000base-x-sfp

device-types/FireBrick/FB6202.yaml

+---
+manufacturer: FireBrick
+model: FB6202
+slug: firebrick-fb6202
+part_number: FB6202
+u_height: 1
+is_full_depth: false
+airflow: passive
+console-ports:
+  - name: Console
+    type: de-9
+power-ports:
+  - name: PSU1
+    type: iec-60320-c14
+    maximum_draw: 30
+  - name: PSU2
+    type: iec-60320-c14
+    maximum_draw: 30
+interfaces:
+  - name: '1'
+    type: 1000base-t
+  - name: '2'
+    type: 1000base-t