USB: serial: ti_usb_3410_5052: remove ti_usb_3410_5052.h

The definitions in ti_usb_3410_5052.h are only used in
ti_usb_3410_5052.c.
The content of the header is copied in ti_usb_3410_5052.c.

Also correct a typo in macro TI_PIPE_MODE_CONTINOUS.

Signed-off-by: Mathieu OTHACEHE <m.othacehe@gmail.com>
[johan: actually remove the header file ]
Signed-off-by: Johan Hovold <johan@kernel.org>