Add support for the XDS110 debug probe using the APIs in the
probe's firmware. Includes support for older versions of the
firmware (with reduced performance) and support for a newer
version that includes OpenOCD specific APIs. Tested on various
TI LauchPads including MSP432P4, MSP432E4, CC2650, CC2652, and
CC3220SF.

Updated to add better support for swd switch. Removed issues found with
clang static analysis.

Updated to add rules entry for the XDS110 probe and Tiva DFU mode (which
affects both XDS110 and ICDI probes).

Change-Id: Ib274143111a68e67e80003797c6a68e3e80976b2
Signed-off-by: Edward Fewell <efewell@ti.com>
Reviewed-on: http://openocd.zylin.com/4322


Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>