kgsl: msm: Do not use missing A608 GMU power counters

The A608 GPU has a reduced set of power counters. Mark the
ones that are not present as broken so they cannot be used.

Change-Id: Idd987acf4b21e1f8d1999bd4673eb234464195af
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>