Update submodule mavlink to latest Fri Jan 7 12:38:29 UTC 2022

    - mavlink in PX4/Firmware (f69efd7): mavlink/mavlink@75204ad
    - mavlink current upstream: mavlink/mavlink@27395aa
    - Changes: mavlink/mavlink@75204ad...27395aa

    27395aa7 2022-01-06 Julian Oes - pymavlink: update submodule to latest master (#1776)
2180611b 2022-01-06 Hamish Willee - MAV_WINCH_STATUS_CLUTCH_ENGAGED: Winch clutch is engaged allowing motor to move freely
7c6f104f 2022-01-05 Jacob Dahl - Extend WINCH_STATUS_FLAG and WINCH_ACTION (#1766)
dcb44e75 2022-01-06 Hamish Willee - Delete unused cmake tree (#1760)
5b8bec5b 2022-01-05 Hamish Willee - common.xml: AUTOTUNE_AXIS_YAW - fix value to correct one for bitmask (#1767)