scsi: fnic: Fix coccinelle warnings

Remove the duplicate copies of this simple function and use an
open-coded version.

drivers/scsi/fnic/fnic_debugfs.c:122:11-31: WARNING opportunity for simple_open, see also structure on line 223

Generated by: coccinelle/api/simple_open.cocci
Signed-off-by: NVasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/fnic/fnic_debugfs.c

@@ -107,24 +107,6 @@ void fnic_debugfs_terminate(void)
 		vfree(fc_trc_flag);
 }
 
-/*
- * fnic_trace_ctrl_open - Open the trace_enable file for fnic_trace
- *               Or Open fc_trace_enable file for fc_trace
- * @inode: The inode pointer.
- * @file: The file pointer to attach the trace enable/disable flag.
- *
- * Description:
- * This routine opens a debugsfs file trace_enable or fc_trace_enable.
- *
- * Returns:
- * This function returns zero if successful.
- */
-static int fnic_trace_ctrl_open(struct inode *inode, struct file *filp)
-{
-	filp->private_data = inode->i_private;
-	return 0;
-}
-
 /*
  * fnic_trace_ctrl_read -
  *          Read  trace_enable ,fc_trace_enable
@@ -220,7 +202,7 @@ static ssize_t fnic_trace_ctrl_write(struct file *filp,
 
 static const struct file_operations fnic_trace_ctrl_fops = {
 	.owner = THIS_MODULE,
-	.open = fnic_trace_ctrl_open,
+	.open = simple_open,
 	.read = fnic_trace_ctrl_read,
 	.write = fnic_trace_ctrl_write,
 };