drm/amd/display: Updates for ODM Transition Test

[Why]
There is an assert in cases where transition from ODM 2:1
to ODM 1:1 (bypass)

[How]
Remove assert since this case is now valid.
Update diags tests for ODM transitions.

Signed-off-by: Eric Bernstein <eric.bernstein@amd.com>
Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Eric Bernstein

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -2789,7 +2789,6 @@ int dcn20_validate_apply_pipe_split_flags(
 				split[i] = 0;
 			} else if (get_num_odm_splits(pipe)) {
 				/* ODM -> MPC transition */
-				ASSERT(0); /* NOT expected yet */
 				if (pipe->prev_odm_pipe) {
 					split[i] = 0;
 					merge[i] = true;