ASoC/soundwire: add fake BPT frame to align Intel DMA buffer size

Bard Liao <yung-chuan.liao@linux.intel.com> says:

There is a constraint on Intel DMA buffer size that needs to be a
multiple of data block size. This series adds some fake BRA frames
to add some extra buffer size to meet the constraint.
The change is mainly on the soundwire tree. It would be better to go
through the soundwire tree.

Link: https://patch.msgid.link/20251030070253.1216871-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: vinodkoul