zephyr: userspace: Fix compilation options #758

Job	Run time
LP64-WIP	3m 28s
manifest-check	46s
build-windows (ptl)	5m 29s
build-windows (mtl lnl)	6m 53s
build-windows (tgl tgl-h)	5m 35s
build-windows (imx8 imx8x imx8m imx8ulp)	5m 56s
build-windows (-d, lnl)	5m 55s
build-linux (mnfst, ptl)	4m 17s
build-linux (mnfst, tgl tgl-h)	3m 52s
build-linux (-d, mnfst, lnl)	4m 18s
build-linux (zmain, mtl lnl)	5m 51s
build-linux (mnfst, --all)	3m 46s
build-linux (mnfst, mtl lnl)	5m 24s
build-linux (zmain, tgl tgl-h)	3m 51s
build-linux (mnfst, imx8 imx8x imx8m imx8ulp)	3m 37s
build-linux (zmain, imx8 imx8x imx8m imx8ulp)	3m 29s
build-linux (zmain, ptl)	4m 11s
compare-linux-win	1m 28s
	1h 18m 6s

Provide feedback