These headers files were missing from the header files that
I added them to; the fact that they were missing didn't
lead to compile errors because by coincidence the missing
headers are included in the source files before including
these headers. But, after the reordering of header inclusions
by Tools/fix_headers.sh, these cases will give rise to compiler
errors.

- allowing decoding of SUMD frame with failsafe bit set
- updating stack failsafe state with the sumd failsafe info

Refer to #5817 issue

* Pixhawk2: Check for mpu9250 during boot

* Fix indentation style

Displaying the RMS innovation values at the end of each replay assets with rapid iteration for time delay parameter tuning without having to plot or post process using another tool.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

This updates cmake_hexagon and cmake_hexagon inside DriverFramework
which fixes somethine about rpcmem.a and the double linking issue.

Flight tested and is working.

Minor message clarity fix.

Have confirmed this works with gazebo sitl.

This adds the message MOUNT_STATUS to report about the attitude of a
gimbal.

We need feedback in mavlink about the attitude of the gimbal. Therefore
the gimbal output angles are published in vmount.

With mavlink2 new messages are added with msg IDs greated than 255.
Therefore the msg ID types needed to be raised everywhere.

There was no feedback if a CMD_SET_MESSAGE_INTERVAL went through or not.

Enables optimum setting of sensor data buffer lengths using specified data delays and min arrival interval.

Baro data arriving too soon after the last measurement due to a high sampling rate or timing jitter is rejected inside the ecl EKF to prevent the data buffer overflowing.
This patch checks the timestamp difference from the last measurement, and if to small, the data is accumulated and the average sent to the EKF when the time delta
is acceptable.

Fixes:

1) Invalid data with a zero time stamp could be the EKF ends up in the data buffers and result in loss of 'good' data from the buffers

2) Magnetometer data was arriving at a rate faster than the data buffers could handle resulting in loss of data.

If the replay data for the baro or mag data has a zero time stamp, then the corresponding relative timestamp published over the combined sensor topic must be se to RELATIVE_TIMESTAMP_INVALID so that the ekf2 module does not try to use this data.

* Fix jmavsim HITL simulation of MAV_CMD_DO_REPOSITION in the case where you have no radio attached to the PX4 and so you have disabled RC link loss for that reason (set NAV_RCL_ACT = 0) but you still want the jmavsimulation to work.  The line of code changed here causes failsafe RTL to kick in without this fix.

* Add altitude hold option using Z position control, while doing velocity control on vx and vy.

* Fix style and rebase issues