AP_Volz_Protocol: move serial port init of Volz protocol into Volz library

[peterbarker]

Avoids spreading information about the Volz protocol throughout the serialmanager code.

Board               AP_Periph  blimp  bootloader  copter  heli  iofirmware  plane  rover  sub
Durandal                       16     *           16      16                16     16     16
Hitec-Airspeed      0                                                                     
KakuteH7-bdshot                40     *           40      40                40     40     40
MatekF405                      -8     *           0       -8                0      -8     0
Pixhawk1-1M-bdshot             -8                 -8      0                 0      -8     -8
f103-QiotekPeriph   -8                                                                    
f303-Universal      -8                                                                    
iomcu                                                           *                         
revo-mini                      0      *           0       0                 -8     0      0
skyviper-v2450                                    0                                       

[IamPete1]

I think this should be set_and_default_baud. That is exactly the AP Param call. It has both set_default which won't change the current value and set_and_default which does.

[peterbarker]

Yep, fixed.

[IamPete1]

LGTM