- allow to enter the NXP ISP by pressing the push button
- need to be in privileged mode when entering ISP (use SVC_2)
Merge branch 'master' of https://github.com/mbedmicro/CMSIS-DAP
no need to enable timer (now that we switched from IRC to XTAL)
Merge pull request #31 from mazgch/master

enter ISP by button