usb: host: ehci-dbg: add blank line after declarations

This patch fixes coding style issues reported by checkpatch concerning
to missing line after variable declarations.
Signed-off-by: NGeyslan G. Bem <geyslan@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-dbg.c

@@ -1071,6 +1071,7 @@ static int debug_bandwidth_open(struct inode *inode, struct file *file)
 static int debug_periodic_open(struct inode *inode, struct file *file)
 {
 	struct debug_buffer *buf;
+
 	buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
 	if (!buf)
 		return -ENOMEM;