AP_RangeFinder: compile mavlink rangefinder in only if HAL_GCS_ENABLED

[peterbarker]

Board,AP_Periph
f303-Universal,-344

Before:

134295144 00000002 T AP_GPS_Backend::send_mavlink_gps_rtk(mavlink_channel_t)
134252500 00000032 T mavlink_frame_char
134251656 00000036 T mavlink_update_checksum
134251692 00000064 T mavlink_get_msg_entry
134252532 00000064 T mavlink_parse_char
134250652 00000080 T mavlink_sha256_init(mavlink_sha256_ctx*)
134313220 00000090 T AP_RangeFinder_MAVLink::handle_msg(__mavlink_message const&)
134251180 00000128 T mavlink_sha256_final_48(mavlink_sha256_ctx*, unsigned char*)
134408816 00000256 t mavlink_sha256_constant_256
134251308 00000348 T mavlink_signature_check(__mavlink_signing*, __mavlink_signing_streams*, __mavlink_message const*)
134252652 00000380 T AP_Periph_FW::can_send_ADSB(__mavlink_adsb_vehicle_t&)
134250732 00000448 T mavlink_sha256_update(mavlink_sha256_ctx*, void const*, unsigned long)
134251756 00000744 T mavlink_frame_char_buffer
134409072 00003996 t mavlink_get_msg_entry::mavlink_message_crcs

After:

pbarker@fx:~/rc/ardupilot((HEAD detached from 0c48652bb2d))$ arm-nm build/f303-Universal/bin/AP_Periph | grep mavlink
134295144 00000002 T AP_GPS_Backend::send_mavlink_gps_rtk(mavlink_channel_t)
134252500 00000032 T mavlink_frame_char
134251656 00000036 T mavlink_update_checksum
134251692 00000064 T mavlink_get_msg_entry
134252532 00000064 T mavlink_parse_char
134250652 00000080 T mavlink_sha256_init(mavlink_sha256_ctx*)
134251180 00000128 T mavlink_sha256_final_48(mavlink_sha256_ctx*, unsigned char*)
134408520 00000256 t mavlink_sha256_constant_256
134251308 00000348 T mavlink_signature_check(__mavlink_signing*, __mavlink_signing_streams*, __mavlink_message const*)
134252652 00000380 T AP_Periph_FW::can_send_ADSB(__mavlink_adsb_vehicle_t&)
134250732 00000448 T mavlink_sha256_update(mavlink_sha256_ctx*, void const*, unsigned long)
134251756 00000744 T mavlink_frame_char_buffer
134408776 00003996 t mavlink_get_msg_entry::mavlink_message_crcs
pbarker@fx:~/rc/ardupilot((HEAD detached from 0c48652bb2d))$ 

[peterbarker]

Board               AP_Periph  blimp  bootloader  copter  heli  iofirmware  plane  rover  sub
Durandal                       *      *           *       *                 *      *      *
HerePro             *                                                                     
Hitec-Airspeed      *                                                                     
KakuteH7-bdshot                *      *           *       *                 *      *      *
MatekF405                      *      *           *       *                 *      *      *
Pixhawk1-1M-bdshot             *                  *       *                 *      *      *
f103-QiotekPeriph   *                                                                     
f303-Universal      -344                                                                  
iomcu                                                           *                         
revo-mini                      *      *           *       *                 *      *      *
skyviper-v2450                                    *