[HRTIM & Scheduling] Control task is not defined as Zero Latency Interupt.

[jalinei]

    IRQ_CONNECT(HRTIM_IRQ_NUMBER,
                HRTIM_IRQ_PRIO,
                _hrtim_callback,
                NULL,
                HRTIM_IRQ_FLAGS);

    irq_enable(HRTIM_IRQ_NUMBER);

Current callback for control task is not defined as zero latency when triggered by HRTIM, but is zero latency when called by TIM6.

This can create non neglectable jitter on the control task.