sof_audio_buffer: Fix compilation error #21550

Job	Run time
LP64-WIP	3m 41s
manifest-check	2m 45s
build-windows (mtl lnl)	12m 43s
build-windows (ptl)	10m 37s
build-windows (imx8 imx8x imx8m imx8ulp)	17m 10s
build-windows (tgl tgl-h)	11m 39s
build-windows (-d, lnl)	10m 12s
build-linux (mnfst, tgl tgl-h)	5m 23s
build-linux (mnfst, ptl)	4m 45s
build-linux (zmain, ptl)	4m 15s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 53s
build-linux (zmain, mtl lnl)	5m 30s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 29s
build-linux (-d, mnfst, lnl)	4m 13s
build-linux (mnfst, mtl lnl)	5m 45s
build-linux (mnfst, --all)	16m 22s
build-linux (zmain, tgl tgl-h)	5m 27s
compare-linux-win	42s
	2h 14m 31s

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