Add ICM42605/ICM42688 support to OMNIBUSF4V3

[wchnflr]

I am attempting to create a custom firmware as reported in (closed) issue #10406.

ICM42688 support is still unavailable for all OMNIBUSF4x targets in INAV 8.0.1. Once I verify that it works, I will create a PR for a new target and mark it as SKIP_RELEASES.

inav_8.0.1_OMNIBUSF4V3_ICM.zip

This target was built by inserting the following in target.h starting at line 70:

  #define USE_IMU_ICM42605
  #define IMU_ICM42605_ALIGN      CW0_DEG
  #define ICM42605_CS_PIN         PA4
  #define ICM42605_SPI_BUS        BUS_SPI1

[wchnflr]

Changed gyro alignment from CW0_DEG to CW180_DEG:

inav_8.0.1_OMNIBUSF4V3_ICMCW180DEG.zip

This target was built by changing the following line in target.h:

  #define IMU_ICM42605_ALIGN      CW180_DEG

[wchnflr]

Added OMNIBUSF4V3_ICM as a unique target in addition to existing OMNIBUSF4V3. The two custom build files above merely added ICM42605 to the OMNIBUSF4V3 target.

inav_8.0.1_OMNIBUSF4V3_ICM.zip