msm: kgsl: Add GPU bus governor from the msm-4.9 to msm-4.14

Adding a snapshot of the devfreq files on 4.9 as of
commit cf0cc6e60bc7 (msm: pcie:fix PCIe L0s and L1 ASPM support).

Change-Id: I627890ce33d88798da5c9ca58be7eb2420a792f0
Signed-off-by: Urvashi Agrawal <urvaagra@codeaurora.org>