audio: buffer: don't overwrite global objects #20927

Job	Run time
manifest-check	52s
build-windows (mtl lnl)	7m 18s
build-windows (imx8 imx8x imx8m imx8ulp)	8m 25s
LP64-WIP	4m 12s
build-windows (-d, lnl)	5m 54s
build-linux (mnfst, tgl tgl-h)	5m 44s
build-linux (zmain, mtl lnl)	5m 17s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	6m 51s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	6m 56s
build-linux (-d, mnfst, lnl)	4m 34s
build-linux (zmain, tgl tgl-h)	5m 37s
build-linux (mnfst, mtl lnl)	5m 23s
build-linux (zmain, ptl)	4m 2s
build-linux (mnfst, ptl)	4m 2s
build-windows (ptl)	5m 29s
build-windows (tgl tgl-h)	6m 25s
build-linux (mnfst, --all)	15m 37s
compare-linux-win	1m 6s
	1h 43m 44s

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