Staging: i2o: Convert comment from C99 style to C89 style

This patch fixes checkpatch.pl error in debug.c
ERROR: do not use C99 // comments

Signed-off-by: Vatika Harlalka <vatikaharlalka@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/i2o/debug.c b/drivers/staging/i2o/debug.c
index 7a16114..6a760db 100644
--- a/drivers/staging/i2o/debug.c
+++ b/drivers/staging/i2o/debug.c
@@ -22,7 +22,7 @@
 	u16 detailed_status = msg[4] & 0xFFFF;
 
 	if (cmd == I2O_CMD_UTIL_EVT_REGISTER)
-		return;		// No status in this reply
+		return;		/* No status in this reply */
 
 	printk("%s%s: ", severity, str);