arm64: dts: imx93: Remove unexistent 'shared-interrupt'

The 'shared-interrupt' property is not documented nor used anywhere.

Remove it.

This fixes the following schema warning:

imx93-11x11-evk.dtb: dma-controller@42000000: Unevaluated properties are not allowed ('shared-interrupt' was unexpected)
	from schema $id: http://devicetree.org/schemas/dma/fsl,edma.yaml#



Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>