Create poweredge_models.txt

Signed-off-by: abhishek-sa1 <abhishek.sa3@dell.com>

control_plane/roles/control_plane_common/files/poweredge_models.txt

@@ -0,0 +1,17 @@
+C4140
+C6420
+C6520
+R240
+R340
+R440
+R540
+R640
+R650
+R740
+R740xd
+R740xd2
+R750
+R750xa
+R840
+R940
+R940xa