[SCSI] dpt_i2o: 64 bit support

This is the code to actually support 64 bit platforms. 64 bit
DMA is enabled on both x86_32 PAE and 64 bit platforms.

This code is based in part on the unofficial adaptec 64-bit
dpt_i2o driver update that I got from Mark Salyzyn at Adaptec.

Signed-off-by: Miquel van Smoorenburg <miquels@cistron.nl>
Acked-by: Mark Salyzyn <Mark_Salyzyn@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/dpti.h

@@ -233,6 +233,7 @@ typedef struct _adpt_hba {
 	u8  top_scsi_channel;
 	u8  top_scsi_id;
 	u8  top_scsi_lun;
+	u8  dma64;
 
 	i2o_status_block* status_block;
 	dma_addr_t status_block_pa;
@@ -252,6 +253,7 @@ typedef struct _adpt_hba {
 	void __iomem *FwDebugBLEDflag_P;// Virtual Addr Of FW Debug BLED
 	void __iomem *FwDebugBLEDvalue_P;// Virtual Addr Of FW Debug BLED
 	u32 FwDebugFlags;
+	u32 *ioctl_reply_context[4];
 } adpt_hba;
 
 struct sg_simple_element {