audio: dai: add NULL converter guard in IPC4 playback fanout #23179

Job	Run time
manifest-check	2m 26s
build-windows (-d, mnfst, lnl)	8m 32s
build-linux (mnfst, lnl)	4m 50s
build-windows (mnfst, imx8 imx8x)	11m 17s
build-windows (mnfst, tgl)	9m 25s
build-windows (mnfst, mtl)	8m 57s
build-windows (mnfst, tgl-h)	8m 20s
build-linux (mnfst, imx8 imx8x)	4m 52s
LP64-WIP	3m 41s
build-windows (mnfst, imx8m imx8ulp)	11m 10s
build-windows (mnfst, ptl)	9m 54s
build-linux (mnfst, tgl-h)	4m 21s
build-linux (mnfst, imx8m imx8ulp)	5m 43s
build-linux (mnfst, wcl imx95)	7m 16s
build-windows (mnfst, lnl)	9m 47s
build-linux (-d, mnfst, lnl)	4m 43s
build-linux (mnfst, mtl)	4m 22s
build-linux (mnfst, tgl)	3m 57s
build-linux (mnfst, ptl)	5m 54s
compare-linux-win	31s
	2h 9m 58s

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