.github/sparse: add imx8 and imx8m for IPC3 coverage #963

Job	Run time
build-windows (imx8 imx8x imx8m imx8ulp)	8m 39s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	5m 32s
build-windows (mtl)	7m 5s
build-linux (mnfst, mtl)	4m 8s
build-windows (tgl tgl-h)	7m 9s
build-linux (mnfst, lnl)	4m 3s
build-windows (-d, mtl)	7m 1s
build-linux (mnfst, tgl tgl-h)	5m 16s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	5m 46s
build-linux (zmain, mtl)	4m 15s
LP64-WIP	3m 56s
build-linux (zmain, lnl)	4m 3s
build-linux (zmain, tgl tgl-h)	5m 8s
build-linux (-d, mnfst, mtl)	4m 14s
manifest-check	42s
build-linux (mnfst, --all)	9m 39s
compare-linux-win	22s
	1h 26m 58s

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