Fix oti6858 debug level

For some reason the oti6858 driver undefines and redefines the dbg
macro. This makes it spew debugging messages at KERN_INFO instead of
KERN_DEBUG.

This patch removes the undef and define making the driver log like every
other USB serial driver.

Signed-off-by: Scott Ashcroft <scott.ashcroft@talk21.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/usb/serial/oti6858.c

@@ -224,10 +224,6 @@ struct oti6858_private {
 	struct usb_serial_port *port;   /* USB port with which associated */
 };
 
-#undef dbg
-/* #define dbg(format, arg...) printk(KERN_INFO "%s: " format "\n", __FILE__, ## arg) */
-#define dbg(format, arg...) printk(KERN_INFO "" format "\n", ## arg)
-
 static void setup_line(struct work_struct *work)
 {
 	struct oti6858_private *priv = container_of(work,