rcar-hpbdma: add max transfer size

shdma_chan_probe() can set max transfer size,
but it will be PAGE_SIZE with out this patch.
Reviewed-by: Max Filippov <max.filippov@cogentembedded.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/sh/rcar-hpbdma.c

@@ -510,6 +510,8 @@ static int hpb_dmae_chan_probe(struct hpb_dmae_device *hpbdev, int id)
 	}
 
 	schan = &new_hpb_chan->shdma_chan;
+	schan->max_xfer_len = HPB_DMA_TCR_MAX;
+
 	shdma_chan_probe(sdev, schan, id);
 
 	if (pdev->id >= 0)