soundwire: send multi sections in one BPT stream #7880

Job	Run time
GCC build X86_64	23m 9s
GCC build i386	16m 26s
Sparse check	3m 30s
GCC static -fanalyzer	4m 17s
GCC build X86_64 with W=1	3m 11s
GCC build X86_64 with W=1 allmodconfig	1m 53s
Clang build x86_64	3m 49s
GCC build arm64 allmodconfig	2m 49s
GCC build arm64	22m 54s
	1h 21m 58s

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