amdgpu/powerplay: Add Stoney to list of early init cases

BugLink: http://bugs.launchpad.net/bugs/1578305Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 9c97e75f)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Christopher Arges <chris.j.arges@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_powerplay.c

@@ -81,6 +81,7 @@ static int amdgpu_powerplay_init(struct amdgpu_device *adev)
 			amd_pp->ip_funcs = &fiji_dpm_ip_funcs;
 			break;
 		case CHIP_CARRIZO:
+		case CHIP_STONEY:
 			amd_pp->ip_funcs = &cz_dpm_ip_funcs;
 			break;
 		default: