drm/amdgpu: add 1.3.1/2.4.0 athub CG support

This patch adds 1.3.1/2.4.0 athub clock gating support.

Signed-off-by: Aaron Liu <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Reviewed-by: Huang Rui <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/athub_v2_0.c

···
 		return 0;
 
 	switch (adev->ip_versions[ATHUB_HWIP][0]) {
+	case IP_VERSION(1, 3, 1):
 	case IP_VERSION(2, 0, 0):
 	case IP_VERSION(2, 0, 2):
 		athub_v2_0_update_medium_grain_clock_gating(adev,

drivers/gpu/drm/amd/amdgpu/athub_v2_1.c

···
 	case IP_VERSION(2, 1, 0):
 	case IP_VERSION(2, 1, 1):
 	case IP_VERSION(2, 1, 2):
+	case IP_VERSION(2, 4, 0):
 		athub_v2_1_update_medium_grain_clock_gating(adev, state == AMD_CG_STATE_GATE);
 		athub_v2_1_update_medium_grain_light_sleep(adev, state == AMD_CG_STATE_GATE);
 		break;