sensor: rm3100: Add ODR build-time setting through DTS property

Using pre-defined values displayed on datasheet's table 5-4 for
CMM Update Rates.

Please note that datasheet specifies these Update-Rates may have
up to 7% standard deviation, which may be significant for certain
applications.

Signed-off-by: Luis Ubieda <luisf@croxel.com>