drm/amd/display: Remove redundant NULL check in DCE11 HWSS

We already check this a couple lines earlier.
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Jordan Lazare <Jordan.Lazare@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

@@ -2017,8 +2017,7 @@ enum dc_status dce110_apply_ctx_to_hw(
 		if (pipe_ctx->stream == pipe_ctx_old->stream)
 			continue;
 
-		if (pipe_ctx->stream && pipe_ctx_old->stream
-				&& !pipe_need_reprogram(pipe_ctx_old, pipe_ctx))
+		if (pipe_ctx_old->stream && !pipe_need_reprogram(pipe_ctx_old, pipe_ctx))
 			continue;
 
 		if (pipe_ctx->top_pipe)