scsi: megaraid_sas: Change RAID_1_10_RMW_CMDS to RAID_1_PEER_CMDS and set value to 2

For RAID1 FastPath writes, driver needs to allocate extra commands
internally to accommodate for the extra peer command being sent.
Currently driver is allocating 2 extra commands for each but only one
extra command is necessary.  Set RAID_1_10_RMW_CMDS to 2 and also change
macro name to RAID_1_PEER_CMDS.

Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_fusion.c

@@ -293,7 +293,7 @@ megasas_fusion_update_can_queue(struct megasas_instance *instance, int fw_boot_c
 
 	if (instance->is_ventura)
 		instance->max_mpt_cmds =
-		instance->max_fw_cmds * RAID_1_10_RMW_CMDS;
+		instance->max_fw_cmds * RAID_1_PEER_CMDS;
 	else
 		instance->max_mpt_cmds = instance->max_fw_cmds;
 }

drivers/scsi/megaraid/megaraid_sas_fusion.h

@@ -101,7 +101,7 @@ enum MR_RAID_FLAGS_IO_SUB_TYPE {
 #define MEGASAS_FP_CMD_LEN	16
 #define MEGASAS_FUSION_IN_RESET 0
 #define THRESHOLD_REPLY_COUNT 50
-#define RAID_1_10_RMW_CMDS 3
+#define RAID_1_PEER_CMDS 2
 #define JBOD_MAPS_COUNT	2
 
 enum MR_FUSION_ADAPTER_TYPE {