* px4 pwm driver for snapdragon

* added driver to cmake file

* applied review changes and adjusted format

* adjustement to review 2

* run formatting

* added timeout initialization

Mavlink module implement HIGH_LATENCY (Iridium)

Signed-off-by: Roman <bapstroman@gmail.com>

roughly 10K bytes below the 1MiB limit

With GCC 4.9 the binary is to large for the flash memory.
This is why we disabled LPE on that platform.

-closes #5862

This update is needed after changes in
https://github.com/ATLFlight/cross_toolchain/pull/10.

AeroFC is updated by Aero board using the UART between AeroFC
and Aero board.

This script will copy firmware and px_uploader.py to Aero board and run
px_uploader.py with the correct paremeters. User only needs to have a
network connection (Ethernet over USB or WiFi) with Aero board to update
AeroFC firmware. The IP/hostname can be given by AERO_HOSTNAME
environment variable.

This disables the following modules to save flash:
- mpu9250 driver because the MPU9250 is rarely used on Pixhawks
- Snapdragon RC PWM passthrough which is rarely used and definitely a
  special/custom configuration. Also, it will soon be obsolete with the
  upcoming PWM support on Snapdragon.

The generated binary hash was off by one.

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.

These are some changes that I needed to compile
most of the unsupported targets.

After this all (make list_config_targets) compile
for me except: posix_eagle_muorb, posix_sdflight_default
and qurt_eagle_legacy_driver_default.