WIP: panfrost: Implement ARB_shader_clock
Using the new kernel cycle counting support. WIP since the patches for that haven't landed yet (actually haven't send-email'd them quite yet, oops) and this depends on new UABI.
Only tested on Bifrost because I refuse to compile another Kevin kernel. But if someone wants to test on Midgard, the code's here.
Edited by Alyssa Rosenzweig