boards: rddrone_fmuk66 fix I2C bus

Ensures I2C data line is open drain.
Tested on RDDRONE.

Signed-off-by: Benjamin Perseghetti <bperseghetti@rudislabs.com>
Co-authored-by: Landon Haugh <landon.haugh1@gmail.com>
Co-authored-by: Sumit Batra <sumit.batra@nxp.com>