Add ITU Region 1 and 2/3 Amateur Radio bands (#897)

Author: caveman99

meshtastic/config.proto

@@ -929,6 +929,16 @@ message Config {
        * Brazil 902MHz
        */
       BR_902 = 26;
+
+      /*
+       * ITU Region 1 Amateur Radio 2m band (144-146 MHz)
+       */
+      ITU1_2M = 27;
+
+      /*
+       * ITU Region 2 / 3 Amateur Radio 2m band (144-148 MHz)
+       */
+      ITU23_2M = 28;
     }
 
     /*