soundwire: lower the trace level to warning when the alert is ignored #8075

Job	Run time
GCC static -fanalyzer	4m 15s
Sparse check	3m 47s
GCC build i386	16m 38s
GCC build X86_64 with W=1 allmodconfig	2m 12s
GCC build X86_64	19m 10s
GCC build arm64 allmodconfig	2m 9s
GCC build arm64	20m 26s
Clang build x86_64	4m 59s
GCC build X86_64 with W=1	3m 21s
	1h 16m 57s

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