board: ti_am43xx_evm: remove xds100v2 interface

GP and EPOS EVMs do not provide xds100v2 on board,
rather they have a pin header which can be used
to attach any debug pod the user might want.

Change-Id: I61678c50900fbe0fab500ea42f85ecde7a490ded
Reported-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Reviewed-on: http://openocd.zylin.com/2618
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>

tcl/board/ti_am43xx_evm.cfg

@@ -1,15 +1,7 @@
 # Works on both AM437x GP EVM and AM438x ePOS EVM
-
-# The JTAG interface is built directly on the board.
-source [find interface/ftdi/xds100v2.cfg]
-
 transport select jtag
 adapter_khz 16000
 
 source [find target/am437x.cfg]
 
 reset_config trst_and_srst
-
-init
-ftdi_set_signal PWR_RST 1
-jtag arp_init