drm/amd/display: apply edge-case DISPCLK WDIVIDER changes to master OTG pipes only

[Why]
The edge-case DISPCLK WDIVIDER changes call stream_enc functions.
But with MPC pipes, downstream pipes have null stream_enc and will
 cause crash.

[How]
Only call stream_enc functions for pipes that are OTG master.
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Samson Tam <samson.tam@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c

@@ -157,7 +157,7 @@ void dcn20_update_clocks_update_dentist(struct clk_mgr_internal *clk_mgr, struct
 			int32_t N;
 			int32_t j;
 
-			if (!pipe_ctx->stream)
+			if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
 				continue;
 			/* Virtual encoders don't have this function */
 			if (!stream_enc->funcs->get_fifo_cal_average_level)
@@ -188,7 +188,7 @@ void dcn20_update_clocks_update_dentist(struct clk_mgr_internal *clk_mgr, struct
 			int32_t N;
 			int32_t j;
 
-			if (!pipe_ctx->stream)
+			if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
 				continue;
 			/* Virtual encoders don't have this function */
 			if (!stream_enc->funcs->get_fifo_cal_average_level)

drivers/gpu/drm/amd/display/dc/clk_mgr/dcn32/dcn32_clk_mgr.c

@@ -355,7 +355,7 @@ static void dcn32_update_clocks_update_dentist(
 			int32_t N;
 			int32_t j;
 
-			if (!pipe_ctx->stream)
+			if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
 				continue;
 			/* Virtual encoders don't have this function */
 			if (!stream_enc->funcs->get_fifo_cal_average_level)
@@ -401,7 +401,7 @@ static void dcn32_update_clocks_update_dentist(
 			int32_t N;
 			int32_t j;
 
-			if (!pipe_ctx->stream)
+			if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
 				continue;
 			/* Virtual encoders don't have this function */
 			if (!stream_enc->funcs->get_fifo_cal_average_level)