scsi: megaraid_sas: memset IOC INIT frame using correct size

Commit b9637d14 ("scsi: megaraid_sas: Resize MFA frame used for IOC
INIT to 4k") increased the size of IOC INIT frame to 4k.  Need to use
updated size when memsetting init_frame.
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_sas_fusion.c

@@ -1048,7 +1048,7 @@ megasas_ioc_init_fusion(struct megasas_instance *instance)
 						(tv.tv_usec / 1000));
 
 	init_frame = (struct megasas_init_frame *)cmd->frame;
-	memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
+	memset(init_frame, 0, IOC_INIT_FRAME_SIZE);
 
 	frame_hdr = &cmd->frame->hdr;
 	frame_hdr->cmd_status = 0xFF;