[SCSI] arcmsr: fix iounmap error for Type B adapter

The Type B Adapter teardown does iounmap on pointers subtracted by a
constant offset.  Since the offset is in bytes, we need the pointers to
be of type void * not uint32_t * so the subtraction is done in the
correct units and we iounmap the correct area.
Signed-off-by: Nick Cheng <nick.cheng@areca.com.tw>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/arcmsr/arcmsr.h

@@ -341,13 +341,13 @@ struct MessageUnit_B
 	uint32_t	done_qbuffer[ARCMSR_MAX_HBB_POSTQUEUE];
 	uint32_t	postq_index;
 	uint32_t	doneq_index;
-	uint32_t	__iomem *drv2iop_doorbell_reg;
-	uint32_t	__iomem *drv2iop_doorbell_mask_reg;
-	uint32_t	__iomem *iop2drv_doorbell_reg;
-	uint32_t	__iomem *iop2drv_doorbell_mask_reg;
-	uint32_t	__iomem *msgcode_rwbuffer_reg;
-	uint32_t	__iomem *ioctl_wbuffer_reg;
-	uint32_t	__iomem *ioctl_rbuffer_reg;
+	void		__iomem *drv2iop_doorbell_reg;
+	void		__iomem *drv2iop_doorbell_mask_reg;
+	void		__iomem *iop2drv_doorbell_reg;
+	void		__iomem *iop2drv_doorbell_mask_reg;
+	void		__iomem *msgcode_rwbuffer_reg;
+	void		__iomem *ioctl_wbuffer_reg;
+	void		__iomem *ioctl_rbuffer_reg;
 };
 
 /*