Provides a properly implemented way for MSP query type OSD implementations (like DJI) to display OSD warnings. Separates the warnings generation from the OSD task and shares common code to make the text available for the OSD and/or via MSP. Eliminates the need to implement hacks and workarounds like using the `CRAFT_NAME` field to display warnings. Since the warnings logic is now separate, the OSD task does not need to be running unlike other hacks.
Adds the `MSP2_GET_OSD_WARNINGS` message formatted as follows:
```
byte description
0 Display attributes including blink (see displayPortAttr_e in drivers/display.h)
1 Length of warning text
2-n Warning text characters
```
First pass at GHST driver including low-latency control, and basic telemetry.
Fix Ghost channel scaling
Use ghstChannelData instead of rxRuntimeState->channelData
Integrate PR feedback
Primarily de-tab and a few cosmetic changes.
Keep Travis CI happy
Removed unused function
Rework ghost driver to reduce time in ISR, move processing
As requested in PR review.
Fixed issue in telemetry driver, mAh consumed is transmitted as units of 10mAh, not 1mAh.
Resolve Packet Collision Issue with GHST
Send telemetry packets only within a well defined time slot after an incoming Rx packet.
Remove unnecessary comment
rxRefreshRate doesn't need to be dynamic.
Ghost - Remove special case from scheduler
No need to reschedule telemetry for the Ghost protocol.
The MSP override mode allows for use of MSP togehter with
another RX feature like SBUS. When enabling the MSP override
mode all channels from the `msp_override_channels` bitmask
will be overwritten by data comming from MSP instead of the
main RX.
The following driver files only contain initialization and configuration fuctions and were erroneously set up for speed-optimization. Moving them to size-optimization saves significant space. They all share common runtime functions contained in `drivers/accgyro/accgyro_mpu.c` which is correctly speed-optimized.
```
drivers/accgyro/accgyro_mpu6050.c
drivers/accgyro/accgyro_mpu6500.c
drivers/accgyro/accgyro_spi_mpu6000.c
drivers/accgyro/accgyro_spi_mpu6500.c
drivers/accgyro/accgyro_spi_mpu9250.c
drivers/accgyro/accgyro_spi_icm20689.c
```
Also added explicit `#ifdef USE_` around the code of some of the drivers missing it. Doesn't result in any space savings as the compiler optimizes out the unused functions. But better in the long-term as it will flag any cases where the code might be called without proper bounding.
Saves 10704 bytes on STM32F7X2.
