dp: Fix DP scheduler locking #21653

Job	Run time
build-windows (mtl lnl)	11m 16s
build-windows (-d, lnl)	10m 15s
LP64-WIP	3m 53s
manifest-check	3m 27s
build-windows (imx8 imx8x imx8m imx8ulp)	14m 40s
build-windows (ptl)	8m 5s
build-windows (tgl tgl-h)	10m 0s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	7m 13s
build-linux (zmain, tgl tgl-h)	6m 56s
build-linux (-d, mnfst, lnl)	5m 12s
build-linux (mnfst, ptl)	4m 58s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	7m 31s
build-linux (zmain, ptl)	4m 56s
build-linux (mnfst, --all)	16m 54s
build-linux (mnfst, tgl tgl-h)	5m 51s
build-linux (mnfst, mtl lnl)	6m 12s
build-linux (zmain, mtl lnl)	6m 17s
compare-linux-win	1m 26s
	2h 15m 2s

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