Cisco 2821 (#1007)

* Add Cisco 2821 model

* Add Cisco VIC2-4FXO card model

* Add Cisco AIM-VPN/EPII-Plus module

* Add PVDM2-64 module

Co-authored-by: Daniel Anner <daniel.anner@danstechsupport.com>

module-types/Cisco/AIM-VPN_EPII-PLUS.yaml

@@ -0,0 +1,4 @@
+---
+manufacturer: Cisco
+model: AIM-VPN/EPII-PLUS
+comments: Enhanced-performance DES/3DES/AES VPN encryption/compression AIM

module-types/Cisco/PVDM2-64.yaml

@@ -0,0 +1,5 @@
+---
+manufacturer: Cisco
+model: PVDM2-64
+part_number: PVDM2-64
+comments: PVDMII DSP SIMM with four DSPs

module-types/Cisco/VIC2-4FXO.yaml

@@ -0,0 +1,22 @@
+---
+manufacturer: Cisco
+model: VIC2-4FXO
+part_number: VIC2-4FXO
+comments: 'Description: 2nd generation four port FXO voice interface daughtercard'
+interfaces:
+  - name: voice-port {module}/0
+    type: other
+    mgmt_only: false
+    label: '0'
+  - name: voice-port {module}/1
+    type: other
+    mgmt_only: false
+    label: '1'
+  - name: voice-port {module}/2
+    type: other
+    mgmt_only: false
+    label: '2'
+  - name: voice-port {module}/3
+    type: other
+    mgmt_only: false
+    label: '3'