Add other Extreme 7520 switches and power supplies (#2479)

* Create 7520-48XT-6C

* Create 7520-48YE-8CE

* Update XN-ACPWR-800W-F.yaml

* Create XN-ACPWR-800W-R.yaml

* Create XN-DCPWR-800W-F.yaml

* Create XN-DCPWR-800W-R.yaml

* Rename 7520-48XT-6C to 7520-48XT-6C.yaml

* Rename 7520-48YE-8CE to 7520-48YE-8CE.yaml

* Create 7520-48Y-8C.yaml

* Fix quotes in 7520-48YE-8CE.yaml

* Fix quotes in 7520-48Y-8C.yaml

* Fix quotes in 7520-48XT-6C.yaml

* Remove USB storage ports

---------

Co-authored-by: Harry <Harry@cadby.co.uk>

module-types/Extreme Networks/XN-ACPWR-800W-F.yaml

@@ -2,10 +2,10 @@
 manufacturer: Extreme Networks
 model: XN-ACPWR-800W-F
 part_number: XN-ACPWR-800W-F
-comments: 800W front to back PSU
+comments: 800W front-to-back airflow PSU for 7520 and 7720 switches
 weight: 810
 weight_unit: g
 power-ports:
   - name: Ps#{module}
-    type: iec-60320-c16
+    type: iec-60320-c14
     maximum_draw: 800

module-types/Extreme Networks/XN-ACPWR-800W-R.yaml

@@ -0,0 +1,11 @@
+---
+manufacturer: Extreme Networks
+model: XN-ACPWR-800W-R
+part_number: XN-ACPWR-800W-R
+comments: 800W back-to-front airflow PSU for 7520 and 7720 switches
+weight: 810
+weight_unit: g
+power-ports:
+  - name: Ps#{module}
+    type: iec-60320-c14
+    maximum_draw: 800

module-types/Extreme Networks/XN-DCPWR-800W-F.yaml

@@ -0,0 +1,11 @@
+---
+manufacturer: Extreme Networks
+model: XN-DCPWR-800W-F
+part_number: XN-DCPWR-800W-F
+comments: 800W front-to-back airflow PSU for 7520 and 7720 switches
+weight: 850
+weight_unit: g
+power-ports:
+  - name: Ps#{module}
+    type: dc-terminal
+    maximum_draw: 800

module-types/Extreme Networks/XN-DCPWR-800W-R.yaml

@@ -0,0 +1,11 @@
+---
+manufacturer: Extreme Networks
+model: XN-DCPWR-800W-R
+part_number: XN-DCPWR-800W-R
+comments: 800W back-to-front airflow PSU for 7520 and 7720 switches
+weight: 850
+weight_unit: g
+power-ports:
+  - name: Ps#{module}
+    type: dc-terminal
+    maximum_draw: 800