ASoC: SOF: Intel: add hyphen between name and index to amp name_prefix #7907

Job	Run time
Sparse check	3m 44s
GCC build X86_64 with W=1	1m 56s
GCC build i386	16m 45s
GCC build arm64	24m 35s
Clang build x86_64	2m 5s
GCC build arm64 allmodconfig	3m 38s
GCC static -fanalyzer	4m 31s
GCC build X86_64 with W=1 allmodconfig	1m 42s
GCC build X86_64	25m 1s
	1h 23m 57s

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