mpt3sas: Added mpt2sas driver definitions

1. Added mpt2sas driver related macros in mpt3sas header files

2. Made scsi host's, raid class', pci's, ioctl's callback functions
global so that both drivers can use them.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -2855,15 +2855,15 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc,  int sleep_flag)
 	else
 		sg_tablesize = MPT3SAS_SG_DEPTH;
 
-	if (sg_tablesize < MPT3SAS_MIN_PHYS_SEGMENTS)
-		sg_tablesize = MPT3SAS_MIN_PHYS_SEGMENTS;
-	else if (sg_tablesize > MPT3SAS_MAX_PHYS_SEGMENTS) {
+	if (sg_tablesize < MPT_MIN_PHYS_SEGMENTS)
+		sg_tablesize = MPT_MIN_PHYS_SEGMENTS;
+	else if (sg_tablesize > MPT_MAX_PHYS_SEGMENTS) {
 		sg_tablesize = min_t(unsigned short, sg_tablesize,
 				      SCSI_MAX_SG_CHAIN_SEGMENTS);
 		pr_warn(MPT3SAS_FMT
 		 "sg_tablesize(%u) is bigger than kernel"
 		 " defined SCSI_MAX_SG_SEGMENTS(%u)\n", ioc->name,
-		 sg_tablesize, MPT3SAS_MAX_PHYS_SEGMENTS);
+		 sg_tablesize, MPT_MAX_PHYS_SEGMENTS);
 	}
 	ioc->shost->sg_tablesize = sg_tablesize;