models: add TL-WR841N(D) v12

models-short.txt

@@ -6,6 +6,7 @@ V1.1=tp-link-cpe210-v1.1
 V9=tp-link-tl-wr841n-nd-v9
 V10=tp-link-tl-wr841n-nd-v10
 V11=tp-link-tl-wr841n-nd-v11
+V12=tp-link-tl-wr841n-nd-v12
 
 [TP-Link TL-WR1043n(d)]
 V2=tp-link-tl-wr1043n-nd-v2

models.txt

@@ -184,6 +184,7 @@ V8=tp-link-tl-wr841n-nd-v8
 V9=tp-link-tl-wr841n-nd-v9
 V10=tp-link-tl-wr841n-nd-v10
 V11=tp-link-tl-wr841n-nd-v11
+V12=tp-link-tl-wr841n-nd-v12
 
 [TP-Link TL-WR842n(d)]
 V1=tp-link-tl-wr842n-nd-v1