Correct Improper SPDX comment style.

Adhere to Linux kernel coding style.

Reported by checkpatch

WARNING: Improper SPDX comment style .../nec7210.h', please use '/*' instead

Signed-off-by: Michael Rubin <matchstick@neverthere.org>
---
 drivers/staging/gpib/include/nec7210.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/gpib/include/nec7210.h b/drivers/staging/gpib/include/nec7210.h
index 4b06ac0408df..5c57fbffb9d0 100644
--- a/drivers/staging/gpib/include/nec7210.h
+++ b/drivers/staging/gpib/include/nec7210.h
@@ -1,4 +1,4 @@
-//* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: GPL-2.0 */
 
 /***************************************************************************
  *    copyright            : (C) 2002 by Frank Mori Hess
-- 
2.43.0