Disable runtime power management on several sienna cichlid
cards, otherwise SMU will possibly fail to be resumed from
runtime suspend. Will drop this after a clean solution between
kernel driver and SMU FW is available.

amdgpu 0000:63:00.0: amdgpu: GECC is enabled
amdgpu 0000:63:00.0: amdgpu: SECUREDISPLAY: securedisplay ta ucode is not available
amdgpu 0000:63:00.0: amdgpu: SMU is resuming...
amdgpu 0000:63:00.0: amdgpu: SMU: I'm not done with your command: SMN_C2PMSG_66:0x0000000E SMN_C2PMSG_82:0x00000080
amdgpu 0000:63:00.0: amdgpu: Failed to SetDriverDramAddr!
amdgpu 0000:63:00.0: amdgpu: Failed to setup smc hw!
[drm:amdgpu_device_ip_resume_phase2 [amdgpu]] *ERROR* resume of IP block <smu> failed -62
amdgpu 0000:63:00.0: amdgpu: amdgpu_device_ip_resume failed (-62)

v2: seperate to a function.
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>