Decode A2MP Get AMP Assoc rsp

Adds decoding Assoc data:

...
> ACL data: handle 11 flags 0x02 dlen 53
    A2MP: Get AMP Assoc rsp: id 1 status (0) Success
      Assoc data [len 39]:
        MAC: <address>
        Preferred Chan List number of triplets 4
          Country code: XXX
          Reg ext id 201 reg class 254 coverage class 0
          Channel 1 max power 20
          Channels 2 - 12 max power 20
          Channels 4 - 8 max power 0
        PAL CAP: 00 00 00 00
        PAL VER: 01 Comp ID: <id> SubVer: 0001
...
1 file changed