[SCSI] mpt2sas: cleanup interrupt routine and config_request optimization

Cleaned up base_interrupt routine to be more effiecent.

Deleted about a third of the config page API by moving redundant code from all
the calling functions to _config_request.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/mpt2sas/mpt2sas_base.h

@@ -785,7 +785,7 @@ int mpt2sas_config_get_sas_iounit_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRep
 int mpt2sas_config_get_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
     *mpi_reply, Mpi2IOUnitPage1_t *config_page);
 int mpt2sas_config_set_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
-    *mpi_reply, Mpi2IOUnitPage1_t config_page);
+    *mpi_reply, Mpi2IOUnitPage1_t *config_page);
 int mpt2sas_config_get_sas_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
     *mpi_reply, Mpi2SasIOUnitPage1_t *config_page, u16 sz);
 int mpt2sas_config_get_ioc_pg8(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t