Audio: Copier: Fix testbench HiFi3 build #19184

Job	Run time
LP64-WIP	4m 3s
manifest-check	48s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 3s
build-windows (imx8 imx8x imx8m imx8ulp)	8m 27s
build-linux (mnfst, mtl)	4m 29s
build-windows (mtl)	6m 13s
build-linux (mnfst, lnl)	4m 14s
build-windows (tgl tgl-h)	7m 25s
build-linux (mnfst, tgl tgl-h)	5m 16s
build-windows (-d, mtl)	5m 49s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	5m 54s
build-linux (zmain, mtl)	4m 26s
build-linux (zmain, lnl)	4m 12s
build-linux (zmain, tgl tgl-h)	5m 21s
build-linux (-d, mnfst, mtl)	4m 25s
build-linux (mnfst, --all)	11m 50s
compare-linux-win	22s
	1h 29m 17s

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