This patch adds support for Silicon Labs (formerly Ember) EM357
and EM358 chips and derivatives.
Change-Id: Ie63aed95a2f4ef1a6b955e301a51b4de1b3a5462
Signed-off-by: Ed Beroset <beroset@ieee.org>
Reviewed-on: http://openocd.zylin.com/2470
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>