V6X-RT Add sensor set V6XRT001 and V6XRT002

[PetervdPerk-NXP]

For V6X-RT DS-020.
Add support for sensor set Rev 2 and Rev 3.
Rev 2 replaces obsolete BMM150 with BMM350.
Rev 3 uses ICM45686 for both IMU2 and IMU3.

HW FMUM ID	Sensor set	IMU1	IMU2	IMU3	Mag 1	Baro 1	Baro 2
0x000	Rev 1	BMI088	ICM42688P	ICM42686P	BMM150	BMP390	BMP390
0x001	Rev 2	BMI088	ICM42688P	ICM42686P	BMM350	BMP390	BMP390
0x002	Rev 3	BMI088	ICM45686	ICM45686	BMM350	BMP390	BMP390

See for setting code point to change sensor set.
https://github.com/pixhawk/Pixhawk-Standards/blob/master/DS-019%20Pixhawk%20versions%20and%20revisions.md

[PetervdPerk-NXP]

@mrpollo would you be able to update DS-020 to include sensor set Rev 3?

[mrpollo]

@PetervdPerk-NXP pixhawk/Pixhawk-Standards#62

[jarivanewijk]

We should probably also add a table of FMU V6X-RT revisions to DS-019. So far all boards from different manufacturers that we at NXP know of were build with HW FMUM ID 0x000, but going forward our own reference design boards will now be build with ID 0x002 and sensor set 3.