DRC: math: Rename variables and functions in accordance SOF math regu… #359

Job	Run time
build-windows (imx8 imx8x imx8m)	6m 19s
build-linux (mnfst, imx8 imx8x imx8m)	4m 12s
build-windows (mtl)	6m 14s
LP64-WIP	3m 19s
build-windows (tgl tgl-h)	7m 3s
build-linux (mnfst, mtl)	4m 23s
manifest-check	45s
build-windows (-d, mtl)	5m 40s
build-linux (mnfst, lnl)	3m 52s
build-linux (mnfst, tgl tgl-h)	4m 58s
build-linux (zmain, imx8 imx8x imx8m)	4m 15s
build-linux (zmain, mtl)	3m 56s
build-linux (zmain, lnl)	3m 51s
build-linux (zmain, tgl tgl-h)	5m 8s
build-linux (-d, mnfst, mtl)	4m 6s
compare-linux-win	1m 8s
	1h 9m 9s

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