scsi: megaraid_sas: clean function declarations in megaraid_sas_base.c up

We get a few warnings when building kernel with W=1:
drivers/scsi/megaraid/megaraid_sas_fusion.c:281:1: warning: no previous prototype for 'megasas_free_cmds_fusion' [-Wmissing-prototypes]
drivers/scsi/megaraid/megaraid_sas_fusion.c:714:1: warning: no previous prototype for 'megasas_ioc_init_fusion' [-Wmissing-prototypes]
....

In fact, these functions are declared in
drivers/scsi/megaraid/megaraid_sas_base.c, but should be declared in a
header file, thus can be recognized in other file.

So this patch adds the declarations into
drivers/scsi/megaraid/megaraid_sas_fusion.h.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Sumit Saxena <sumit.saxena@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_fusion.h

@@ -991,5 +991,14 @@ union desc_value {
 	} u;
 };
 
+void megasas_free_cmds_fusion(struct megasas_instance *instance);
+int megasas_ioc_init_fusion(struct megasas_instance *instance);
+u8 megasas_get_map_info(struct megasas_instance *instance);
+int megasas_sync_map_info(struct megasas_instance *instance);
+void megasas_release_fusion(struct megasas_instance *instance);
+void megasas_reset_reply_desc(struct megasas_instance *instance);
+int megasas_check_mpio_paths(struct megasas_instance *instance,
+			      struct scsi_cmnd *scmd);
+void megasas_fusion_ocr_wq(struct work_struct *work);
 
 #endif /* _MEGARAID_SAS_FUSION_H_ */