mx6q: allow uart5 to be used
ENGR00255481 mx6: Update equation for thermal sensor

Use universal equation and 25C's calibration data to
get thermal sensor's ratio.

This method uses only raw25 from fuses

If want to use old calibration method, please add
"use_calibration" into kernel command line.

Signed-off-by: Anson Huang <b20788@freescale.com>
Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>