ipc4: helper: guard TLV loop against NULL from tlv_next() #23132

Job	Run time
LP64-WIP	3m 48s
manifest-check	2m 48s
build-windows (mnfst, lnl)	9m 8s
build-windows (-d, mnfst, lnl)	9m 21s
build-windows (mnfst, tgl-h)	9m 9s
build-windows (mnfst, imx8 imx8x)	9m 31s
build-linux (mnfst, imx8m imx8ulp)	4m 41s
build-windows (mnfst, mtl)	9m 41s
build-windows (mnfst, tgl)	8m 59s
build-linux (mnfst, mtl)	4m 32s
build-linux (mnfst, lnl)	4m 21s
build-linux (mnfst, ptl)	5m 40s
build-linux (mnfst, imx8 imx8x)	5m 15s
build-linux (mnfst, tgl)	4m 5s
build-linux (-d, mnfst, lnl)	4m 18s
build-linux (mnfst, wcl imx95)	6m 59s
build-linux (mnfst, tgl-h)	4m 4s
build-windows (mnfst, ptl)	10m 36s
build-windows (mnfst, imx8m imx8ulp)	10m 17s
compare-linux-win	25s
	2h 7m 38s

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