hlte: Only use hwmon devfreq governor on 8974pro

 * Non-pro 8974 is not equipped for this.

Change-Id: I6d2e74549e2a0cc40174b3ac471d3d67b1b284cb
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_qcom-common into cm-11.0