Adjust BATT_MON parameters for disambiguation

[peterbarker]

now another backend has parameters which duplicate some in the analog backend we need to fix links to link to the analogue backend rather than the AD7091R5 backend

[Hwurzburg]

think you missed a few:
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:45: WARNING: undefined label: 'batt_volt_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:46: WARNING: undefined label: 'batt_volt_mult'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:47: WARNING: undefined label: 'batt_curr_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:48: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:49: WARNING: undefined label: 'batt_amp_offset'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:60: WARNING: undefined label: 'batt_volt_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:61: WARNING: undefined label: 'batt_curr_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:63: WARNING: undefined label: 'batt_volt_mult'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-3dr-power-module.rst:63: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-omnibusf7.rst:92: WARNING: undefined label: 'batt_amp_offset'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-omnibusnanov6.rst:136: WARNING: undefined label: 'batt_volt_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-omnibusnanov6.rst:138: WARNING: undefined label: 'batt_volt_mult'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-omnibusnanov6.rst:148: WARNING: undefined label: 'batt_curr_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-omnibusnanov6.rst:150: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-omnibusnanov6.rst:156: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-power-module-configuration-in-mission-planner.rst:90: WARNING: undefined label: 'batt_max_amps'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-radiolinkpix6.rst:553: WARNING: undefined label: 'batt_volt_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-radiolinkpix6.rst:554: WARNING: undefined label: 'batt_curr_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-radiolinkpix6.rst:555: WARNING: undefined label: 'batt_volt_mult'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-radiolinkpix6.rst:556: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-smartap-pdb.rst:76: WARNING: undefined label: 'batt_amp_offset'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-synthetic-current-monitor.rst:20: WARNING: undefined label: 'batt_volt_pin'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-synthetic-current-monitor.rst:21: WARNING: undefined label: 'batt_volt_mult'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-synthetic-current-monitor.rst:25: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-synthetic-current-monitor.rst:26: WARNING: undefined label: 'batt_amp_offset'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/common-synthetic-current-monitor.rst:29: WARNING: undefined label: 'batt_amp_pervlt'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/fpv-plane.rst:200: WARNING: undefined label: 'batt_amp_offset'
/home/henry/Desktop/ardupilot_wiki/plane/source/docs/fpv-plane.rst:200: WARNING: undefined label: 'batt_amp_offset'