adi_v5_cmisis_dap: Separate ABORT from clearing sticky errors

adi_v5_cmisis_dap: Separate ABORT from clearing sticky errors

We don't need to do full blown AP ABORT in case of CMSIS-DAP errors,
and the code that was in place was not doing that(issuing AP ABORT)
anyway.

Change-Id: Ide83b1f8875d725da6cb0d53aae8229f8c6316b3
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/2112
Tested-by: jenkins
Reviewed-by: Andrey Yurovsky <yurovsky@gmail.com>