ASoC: SOF: hda-sdw-bpt: mark bpt_stream->link_locked #7858

Job	Run time
GCC build i386	16m 2s
GCC build X86_64 with W=1	3m 43s
GCC build X86_64	24m 32s
GCC build arm64	21m 28s
Clang build x86_64	5m 16s
GCC build arm64 allmodconfig	3m 59s
Sparse check	3m 45s
GCC build X86_64 with W=1 allmodconfig	2m 18s
GCC static -fanalyzer	4m 25s
	1h 25m 28s

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