DMA: shdma: switch all __iomem pointers to void

In the shdma driver __iomem pointers are used to point to hardware
registers.  Using typed pointers like "u32 __iomem *" in this case is
inconvenient, because then offsets, added to such pointers, have to be
devided by sizeof(u32) or similar. Switch the driver to use void
pointers, which avoids this clumsiness.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/sh/shdma.h

@@ -28,7 +28,7 @@ struct sh_dmae_chan {
 	struct shdma_chan shdma_chan;
 	const struct sh_dmae_slave_config *config; /* Slave DMA configuration */
 	int xmit_shift;			/* log_2(bytes_per_xfer) */
-	u32 __iomem *base;
+	void __iomem *base;
 	char dev_id[16];		/* unique name per DMAC of channel */
 	int pm_error;
 };
@@ -38,8 +38,8 @@ struct sh_dmae_device {
 	struct sh_dmae_chan *chan[SH_DMAE_MAX_CHANNELS];
 	struct sh_dmae_pdata *pdata;
 	struct list_head node;
-	u32 __iomem *chan_reg;
-	u16 __iomem *dmars;
+	void __iomem *chan_reg;
+	void __iomem *dmars;
 	unsigned int chcr_offset;
 	u32 chcr_ie_bit;
 };