thermal: tsens: Add calibration support for MSM8909

Add efuse reads to compute slope and offset used to convert final
temperature readings. Add all efuse related TSENS reads for 1xxx
controller across different targets in a common file for calibration.

Change-Id: I85bf5864230c60d796c4a32963fe896da5f9a095
Signed-off-by: Chinkit Kumar,Kirti Kumar Parmar <parma@codeaurora.org>