drm/amdgpu/powerplay: fix mclk switch limit on polaris

Update switch limit on newer polaris variants.  This may fix
flickering with high refresh rates with mclk switching enabled.

Reviewed-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2018-11-29 19:20:28 -05:00
commit 7d98e1e7ee