WP7702 Custom Board

Good morning,
We realized a custom board starting from a mangoH yellow, this new device is 99% similar to original device, but we removed the i2c multiplexer component, connecting the bmi160 directly to i2c (in our project we dont need other hardware muxed… wifi etc).
On my board i run legato 19.5, and I load the yellow_wp77xx_update… but now i cant access the accelerometer…
Can someone point me in the right direction on how to remove the multiplexer code and load drivers so i can talk directly with bmi160 without (U505… TCA9546A)?

best regards