mali_kbase: platform: Add QOS support

This change allows the GPU DVFS table to specify clock restrictions
for INT, MIF and the CPU clusters to ensure consistent performance.
These restrictions are set via Linux's PM QOS framework and rely on
devfreq and cpufreq support. It also adds support for bus traffic
shaping scenarios.

Configuration for these features is read from the GPU's device tree
node.

Bug: 156057140
Bug: 158091247
Signed-off-by: Sidath Senanayake <sidaths@google.com>
Change-Id: I13a92c147aa0b22df2dc1207ccffda7eacd1c8d0