Added TP-Link Archer C7 AC1750 v4 Wifi router as device type. (#2379)

* Added TP-Link Archer C7 AC1750 v4 Wifi router.

* Update Archer-C7-AC1750-v4.yaml

Added some extra detail

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Co-authored-by: Harry

device-types/TP-Link/Archer-C7-AC1750-v4.yaml

@@ -0,0 +1,29 @@
+---
+manufacturer: TP-Link
+model: Archer C7 AC1750 v4
+slug: tp-link-archer-c7-v4
+u_height: 0
+is_full_depth: false
+airflow: passive
+weight: 510
+weight_unit: g
+comments: '[Archer C7 AC1750](https://www.tp-link.com/fi/home-networking/wifi-router/archer-c7)'
+power-ports:
+  - name: PS1
+    type: dc-terminal
+    maximum_draw: 7
+interfaces:
+  - name: wan
+    type: 1000base-t
+  - name: lan1
+    type: 1000base-t
+  - name: lan2
+    type: 1000base-t
+  - name: lan3
+    type: 1000base-t
+  - name: lan4
+    type: 1000base-t
+  - name: wlan0
+    type: ieee802.11n
+  - name: wlan1
+    type: ieee802.11ac