DRC: math: Rename variables and functions in accordance SOF math regu… #357

Job	Run time
LP64-WIP	3m 32s
build-linux (mnfst, imx8 imx8x imx8m)	4m 30s
build-windows (imx8 imx8x imx8m)	6m 41s
build-linux (mnfst, mtl)	4m 21s
build-windows (mtl)	5m 54s
manifest-check	50s
build-windows (tgl tgl-h)	6m 46s
build-linux (mnfst, lnl)	3m 56s
build-windows (-d, mtl)	6m 19s
build-linux (mnfst, tgl tgl-h)	5m 10s
build-linux (zmain, imx8 imx8x imx8m)	4m 19s
build-linux (zmain, mtl)	4m 13s
build-linux (zmain, lnl)	4m 4s
build-linux (zmain, tgl tgl-h)	4m 44s
build-linux (-d, mnfst, mtl)	4m 18s
compare-linux-win	21s
	1h 9m 58s

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