DP: Fix dp period calculation for DP modules #15614

Job	Run time
manifest-check	49s
build-linux (mnfst, imx8 imx8x imx8m)	4m 17s
build-linux (mnfst, mtl)	4m 18s
build-windows (imx8 imx8x imx8m)	6m 45s
build-linux (mnfst, lnl)	3m 57s
build-windows (mtl)	6m 26s
build-linux (mnfst, tgl tgl-h)	4m 57s
build-windows (tgl tgl-h)	8m 45s
LP64-WIP	3m 39s
build-linux (zmain, imx8 imx8x imx8m)	4m 18s
build-windows (-d, mtl)	6m 22s
build-linux (zmain, mtl)	3m 58s
build-linux (zmain, lnl)	4m 13s
build-linux (zmain, tgl tgl-h)	4m 47s
build-linux (-d, mnfst, mtl)	4m 5s
compare-linux-win	1m 14s
	1h 12m 50s

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