kgsl: add a new governor algorithm. Ditch the older Simple Governor to make place for Interactive. This name is chosen just to differentiate from the others, but it doesn't behave like the CPU governor Interactive. This uses a completely different algorithm to decide when to increase or decrease the GPU frequency. Also the functions tz_wake and tz_sleep don't do anything, they were a bit useless at this point after some testing.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>
kgsl: add back content to the sleep function for this tz routine. Also fix the length of the governor name for the sysfs entry.

Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>