drm/amdgpu/dpm: add an implementation for get_vce_clock_state (v2)

Used by the non-powerplay dpm code.

v2: update to the new API

Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -956,3 +956,12 @@ u8 amdgpu_encode_pci_lane_width(u32 lanes)
 
 	return encoded_lanes[lanes];
 }
+
+struct amd_vce_state*
+amdgpu_get_vce_clock_state(struct amdgpu_device *adev, unsigned idx)
+{
+	if (idx < adev->pm.dpm.num_of_vce_states)
+		return &adev->pm.dpm.vce_states[idx];
+
+	return NULL;
+}