debugfs: Modify default debugfs directory for debugging pktcdvd.

As we all know, We need change default directory for consistency of
debugfs by Greg K-H
Signed-off-by: NGeunSik Lim <geunsik.lim@samsung.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/block/pktcdvd.c

@@ -92,7 +92,7 @@ static struct mutex ctl_mutex;	/* Serialize open/close/setup/teardown */
 static mempool_t *psd_pool;
 
 static struct class	*class_pktcdvd = NULL;    /* /sys/class/pktcdvd */
-static struct dentry	*pkt_debugfs_root = NULL; /* /debug/pktcdvd */
+static struct dentry	*pkt_debugfs_root = NULL; /* /sys/kernel/debug/pktcdvd */
 
 /* forward declaration */
 static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev);