ARM: dts: imx6qdl: remove fsl,ssi-dma-events

All dtsi files where already moved to generic dma bindings. Remove the
old non-generic DMA properties.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
1 file changed