dmaengine: shdma: add chcr_ie_bit

IE bit position on CHCR register is not same in all DMAC.
This patch adds new "chcr_ie_bit" to decide it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 6f064ca..dc56576 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -48,6 +48,7 @@
 	u32 __iomem *chan_reg;
 	u16 __iomem *dmars;
 	unsigned int chcr_offset;
+	u32 chcr_ie_bit;
 };
 
 #define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)