drm/amd/powerplay: skip pcie params override on Arcturus V2

This is not supported on Arcturus.

Affected ASIC: Arcturus

V2: minor cosmetic fix

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Le Ma <Le.Ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>