dmaengine: moxart-dma: remove unused struct 'moxart_filter_data'

Remove unused struct 'moxart_filter_data'

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20240516152825.262578-1-linux@treblig.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>