libs/wlgen/rta: add support to specify per task's affinity

When a 'profile' based task is defined we can force the CPU affinity
of that task by specifying CPUs ranges. The syntax is the same used
to specify ranges for a cpuset affinity, e.g.
   cpus='1,3,4-7'
means to set the task affinity to CPUs [1,3,4,5,6,7]

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
2 files changed