thermal: tsens8974: Fix div0 temperature warnings
thermal: tsens8974: Fix div0 temperature warnings

Fix reporting temperature when using two point calibration.
Slope is calculate using code/degC.

Change-Id: I7d9b99f68d89c5d7e068737d5a4079985328a844
Signed-off-by: Siddartha Mohanadoss <9c97603a3a6be1a8a5dd7a9c9672e79ad0487bf3@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas