DRC: math: Replace exponential function for performance #340

Job	Run time
build-linux (mnfst, imx8 imx8x imx8m)	4m 10s
LP64-WIP	3m 37s
build-linux (mnfst, mtl)	4m 3s
manifest-check	41s
build-linux (mnfst, lnl)	3m 50s
build-windows (imx8 imx8x imx8m)	6m 48s
build-linux (mnfst, tgl tgl-h)	5m 15s
build-linux (zmain, imx8 imx8x imx8m)	4m 26s
build-linux (zmain, mtl)	3m 53s
build-windows (mtl)	5m 28s
build-linux (zmain, lnl)	4m 17s
build-windows (tgl tgl-h)	7m 17s
build-linux (zmain, tgl tgl-h)	5m 6s
build-windows (-d, mtl)	5m 22s
build-linux (-d, mnfst, mtl)	4m 8s
compare-linux-win	1m 17s
	1h 9m 38s

Provide feedback