[target] SIRMIXALOT add gyro, baro, flash

[nerdCopter]

• according to schematic
• https://oshpark.com/shared_projects/uQkUjylH

[ot0tot]

Is this a community target? Is there a Discord channel for it?

[nerdCopter]

@ot0tot , i just want the configs to compile and be accurate according to search-results.
2020: seemingly opensource: https://www.pcbway.com/project/shareproject/SirMixALot_V1_2_1_Flight_Controller.html

*edited

[ot0tot]

I pushed a commit to add #define BARO_CS_PIN PB9.
Should be good to go now.