FMCOMMS1 : Get ready to read and display DAC temperature

Signed-off-by: Robin Getz <Robin.Getz@analog.com>
FMCOMMS1: Apply fixes from fmcomms1 to fmcomms2
          to handle single/dual tones better

Signed-off-by: Robin Getz <Robin.Getz@analog.com>
FMComms1: Since the I/Q swapped, we need to swap the calibration scheme.

Signed-off-by: Robin Getz <Robin.Getz@analog.com>