We got over the limit

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

- created one method which has access to the pwm output device

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

- board config can define PX4_PWM_ALTERNATE_RANGES which needs to be known
by the compiler prior to processing this file

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

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

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

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

to VtolType class

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

- moved methods used to modify channel maximum pwm value to VtolType
class so that the can be shared by the differnt vtol types

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

 - closes #9277

- disables setting of the errno variable as required by C89/C99 on calling math library routines

- Addional small cleanup of the iridium driver and the include guards of mavlink module header files

Due to the old heartbeat of the high latency telemetry when activating it after flying sufficiently long in normal telemetry it is first detected as lost until the first message is sent.
By updating the heartbeat to the current time on switching this issue is avoided.

Also includes a small style fix for the HIGH_LATENCY2 stream