Hi,

This patch adds an output pin, "active" to the sid-sched component which 
indicates when the scheduler is running. That is, when "enable?" is 
greater than or equal to "enable-threshold". This pin is driven with 0 
when the scheduler is inactive and with 1 when it is active. This pin 
can be used by components which may need to change state depending on 
the state of the scheduler.

OK to commit?

Dave