cfg: Switch ti_beaglebone to new ftdi interface

Tested on Beagelbone White.

Change-Id: I544d7c1ba21a6bd594c0a1c4a9611639fa3c320d
Signed-off-by: Tom Rini <trini@ti.com>
Reviewed-on: http://openocd.zylin.com/2017
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

tcl/board/ti_beaglebone.cfg

@@ -2,10 +2,7 @@
 #  http://beagleboard.org/bone
 
 # The JTAG interface is built directly on the board.
-interface ft2232
-#ft2232_device_desc "BeagleBone A"
-ft2232_layout xds100v2
-ft2232_vid_pid 0x0403 0xa6d0 0x0403 0x6010
+source [find interface/ftdi/xds100v2.cfg]
 
 adapter_khz 16000