msm: kgsl: Add GPU bus governor from the msm-4.4 to msm-4.9

Adding the snapshot of the files from the msm-4.4 to msm-4.9.
Base commit in msm-4.4 tree is
Commit-Id: 8df0f9ec1df7b281f0a7a0f29321a90d19b3e381.

CRs-Fixed: 2017390
Change-Id: I45122ca1f0d1f7e443e7cdf1374e662625f17ee4
Signed-off-by: Oleg Perelet <operelet@codeaurora.org>