DRC: math: Replace exponential function for performance #341

Job	Run time
LP64-WIP	4m 7s
manifest-check	1m 8s
build-linux (mnfst, imx8 imx8x imx8m)	4m 11s
build-windows (imx8 imx8x imx8m)	6m 35s
build-linux (mnfst, mtl)	3m 59s
build-linux (mnfst, lnl)	4m 17s
build-windows (mtl)	5m 49s
build-windows (tgl tgl-h)	6m 25s
build-linux (mnfst, tgl tgl-h)	4m 58s
build-windows (-d, mtl)	5m 20s
build-linux (zmain, imx8 imx8x imx8m)	4m 6s
build-linux (zmain, mtl)	3m 54s
build-linux (zmain, lnl)	3m 49s
build-linux (zmain, tgl tgl-h)	5m 5s
build-linux (-d, mnfst, mtl)	3m 59s
compare-linux-win	25s
	1h 8m 7s

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