hrtimers: don't consider available freqs when choosing sampling rate

hrtimers: don't consider available freqs when choosing sampling rate

The hrtimer sampling rate is set to the lowest available sensor freq
higher than the requested sampling rate.
Don't let the hrtimer sampling rate to be influenced by available freqs,
but write to the sensor's sampling rate interface the closest value.

Tracked-On: https://jira01.devtools.intel.com/browse/GMINL-13721
Change-Id: I85095261d0259f40ec19ff45c45ba0a230a904b9
Signed-off-by: Constantin Musca <constantin.musca@intel.com>
Reviewed-on: https://android.intel.com:443/391322