sensor: update drivers to not return double values

Update drivers to return INT_PLUS_MICRO values instead of doubles.

This hides the fact that the drivers use floating point operations and
doesn't force the application to use them as well.

Change-Id: I14c6faecb35331c2fdbdab41bc624d751de984b8
Signed-off-by: Bogdan Davidoaia <bogdan.m.davidoaia@intel.com>
5 files changed