Add dynamic precision in critical sensor

Reading precision values from json file for each critical
sensor to be displayed on lcd screen and adjust output as
per precision value.

Tested: verified with lcd debug card screen.

Change-Id: I43bc0334fba8d939fc7c6da872e92dcf35eeefc7
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
2 files changed