arm64: dts: imx8qxp-ai_ml: Fix checkpatch warnings

Fix the following warnings reported by checkpatch:
arch/..../imx8qxp-ai_ml.dts:198: WARNING: please, no space before tabs

Signed-off-by: Kwon Tae-young <tykwon@m2i.co.kr>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>