drm/amd/display: Allow RCG for Static Screen + LVP for DCN35

[Why]
We want to block IPS2 for static screen but allow it for power state
transitions.

[How]
Set DalDisableIPS=6 for DCN35 which allows:
1. RCG during static screen
2. RCG during LVP
3. IPS2 for display off / S0i3
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Roman Li <roman.li@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -1726,8 +1726,10 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 
 	if (amdgpu_dc_debug_mask & DC_DISABLE_IPS)
 		init_data.flags.disable_ips = DMUB_IPS_DISABLE_ALL;
+	else
+		init_data.flags.disable_ips = DMUB_IPS_RCG_IN_ACTIVE_IPS2_IN_OFF;
 
-	init_data.flags.disable_ips_in_vpb = 1;
+	init_data.flags.disable_ips_in_vpb = 0;
 
 	/* Enable DWB for tested platforms only */
 	if (amdgpu_ip_version(adev, DCE_HWIP, 0) >= IP_VERSION(3, 0, 0))