RTCv2. Alarm numbering now uses more intuitive scheme (starting from 0).

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7453 35acf78f-673a-0410-8e92-d51de3d6d3f4
RTCv2. Fixed testhal application.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7454 35acf78f-673a-0410-8e92-d51de3d6d3f4