timer: tickless: arcv2: Add tickless kernel support

Add tickless kernel support. Sets timer always in one
shot mode to the time the kernel scheduler needs the
next timer event. Uses mili seconds as the scheduling
time unit.

Jira: ZEP-1817
Change-Id: Ia2e63711cdd9d7d9c241b9ff08a606aa79575012
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>