soundwire/ASoC: add fake BRA frame to align Intel DMA buffer size #7823

Job	Run time
Clang build x86_64	5m 13s
GCC build arm64	23m 30s
GCC static -fanalyzer	4m 2s
GCC build i386	2m 55s
GCC build arm64 allmodconfig	3m 23s
Sparse check	3m 12s
GCC build X86_64 with W=1	3m 5s
GCC build X86_64 with W=1 allmodconfig	2m 18s
GCC build X86_64	22m 33s
	1h 10m 11s

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