scsi: csiostor: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the return
value.  The function can work or not, but the code logic should never do
something different based on this.

Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: Varun Prakash <varun@chelsio.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Oza Pawandeep <poza@codeaurora.org>
Cc: linux-scsi@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/csiostor/csio_init.c

@@ -167,14 +167,10 @@ csio_dfs_destroy(struct csio_hw *hw)
  * csio_dfs_init - Debug filesystem initialization for the module.
  *
  */
-static int
+static void
 csio_dfs_init(void)
 {
 	csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
-	if (!csio_debugfs_root)
-		pr_warn("Could not create debugfs entry, continuing\n");
-
-	return 0;
 }
 
 /*