Add Brocade 300 (#1567)

* Add Brocade 300

* Change model and part number to string

device-types/Brocade/300.yaml

@@ -0,0 +1,68 @@
+---
+manufacturer: Brocade
+model: '300'
+slug: brocade-300
+part_number: '300'
+u_height: 1
+is_full_depth: false
+airflow: rear-to-front
+weight: 4.2
+weight_unit: kg
+comments: '[BROCADE 300](https://www.dataswitchworks.com/datasheets/switches/300-ds-03.pdf)'
+console-ports:
+  - name: Console
+    type: rj-45
+power-ports:
+  - name: PSU1
+    type: iec-60320-c14
+    maximum_draw: 57
+    allocated_draw: 48
+interfaces:
+  - name: FC port 0/0
+    type: 8gfc-sfpp
+  - name: FC port 0/1
+    type: 8gfc-sfpp
+  - name: FC port 0/2
+    type: 8gfc-sfpp
+  - name: FC port 0/3
+    type: 8gfc-sfpp
+  - name: FC port 0/4
+    type: 8gfc-sfpp
+  - name: FC port 0/5
+    type: 8gfc-sfpp
+  - name: FC port 0/6
+    type: 8gfc-sfpp
+  - name: FC port 0/7
+    type: 8gfc-sfpp
+  - name: FC port 0/8
+    type: 8gfc-sfpp
+  - name: FC port 0/9
+    type: 8gfc-sfpp
+  - name: FC port 0/10
+    type: 8gfc-sfpp
+  - name: FC port 0/11
+    type: 8gfc-sfpp
+  - name: FC port 0/12
+    type: 8gfc-sfpp
+  - name: FC port 0/13
+    type: 8gfc-sfpp
+  - name: FC port 0/14
+    type: 8gfc-sfpp
+  - name: FC port 0/15
+    type: 8gfc-sfpp
+  - name: FC port 0/16
+    type: 8gfc-sfpp
+  - name: FC port 0/17
+    type: 8gfc-sfpp
+  - name: FC port 0/18
+    type: 8gfc-sfpp
+  - name: FC port 0/19
+    type: 8gfc-sfpp
+  - name: FC port 0/20
+    type: 8gfc-sfpp
+  - name: FC port 0/21
+    type: 8gfc-sfpp
+  - name: FC port 0/22
+    type: 8gfc-sfpp
+  - name: FC port 0/23
+    type: 8gfc-sfpp