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[WHY & HOW] After we allocate BW at plug, we will de-alloc and allocate only what stream needs at stream_enable() [HOW] Introduce bw allocation check at link_enable() for DPIA links Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com> Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: Mustapha Ghaddar <mghaddar@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>