ASoC: SOF: Intel: remove hyphen from AMP<index> name_prexix #7940

Job	Run time
Sparse check	3m 44s
GCC static -fanalyzer	4m 16s
GCC build X86_64 with W=1	2m 10s
GCC build i386	16m 45s
GCC build arm64 allmodconfig	3m 6s
GCC build X86_64	25m 21s
Clang build x86_64	2m 24s
GCC build arm64	23m 49s
GCC build X86_64 with W=1 allmodconfig	1m 45s
	1h 23m 20s

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