[SCSI] mpt2sas: make global symbols unique

The ioc_list global symbol is already used in 1st generation mpt
fusion drivers, so this patch makes it unique in the 2nd generation
driver.  I've checked the entire sources, and I don't see any other
global system missing the mpt2sas_xxx prefix.

Signed-off-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index 4fbe3f8..2d4f85c 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -355,7 +355,7 @@
 {
 	struct MPT2SAS_ADAPTER *ioc;
 
-	list_for_each_entry(ioc, &ioc_list, list) {
+	list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 		if (ioc->id != ioc_number)
 			continue;
 		*iocpp = ioc;
@@ -439,7 +439,7 @@
 
 	poll_wait(filep, &ctl_poll_wait, wait);
 
-	list_for_each_entry(ioc, &ioc_list, list) {
+	list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 		if (ioc->aen_event_read_flag)
 			return POLLIN | POLLRDNORM;
 	}
@@ -2497,7 +2497,7 @@
 	struct MPT2SAS_ADAPTER *ioc;
 	int i;
 
-	list_for_each_entry(ioc, &ioc_list, list) {
+	list_for_each_entry(ioc, &mpt2sas_ioc_list, list) {
 
 		/* free memory associated to diag buffers */
 		for (i = 0; i < MPI2_DIAG_BUF_TYPE_COUNT; i++) {