rcar-hpbdma: initialise plane information when halted

Plane information should be initialized when halted.
It may restart from the wrong plane without 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

@@ -287,6 +287,9 @@ static void hpb_dmae_halt(struct shdma_chan *schan)
 
 	ch_reg_write(chan, HPB_DMAE_DCMDR_DQEND, HPB_DMAE_DCMDR);
 	ch_reg_write(chan, HPB_DMAE_DSTPR_DMSTP, HPB_DMAE_DSTPR);
+
+	chan->plane_idx = 0;
+	chan->first_desc = true;
 }
 
 static const struct hpb_dmae_slave_config *