power: Disable the 8974pro-specific display on/off path

 * It's now handled by mpctl directly, and this code does not correctly
   handle the interactive governor. Just disable it as the main
   function does everything we need.

Change-Id: I8fdf9d80bfbf940b55bbe962c1e7a0829bcec14c
qcom/common: Added O_NOFOLLOW to avoid follow the symlink

open system call is added with NOFOLLOW flag

Change-Id: I402643635e3ee11b3ac5df63c3b71a9fd6f0d2db