Hi,

This patch does the following things :

* Bouncing of IRQs between CPUs reduction
  If IRQ already moved - check if further move makes sense
  (blocks bounce forth and back)

* Bring back interrupts to the IRQ_PRIMARY_CPU (default = 0)
  If interupts / time drops down the IRQ is routed back to the default CPU

* Introduces a desc_interrupt[irq].processor value
  This is needed to decide which IRQ has to be routed back to the default CPU.

* Add visualization for desc_interrupt[irq].processor value in
  '/proc/interrupt'

* If less than 2 CPUs online on boot-time kirqd is not started
  At least the rest of the logic wouldn't be able to recognize added CPUs at a
  later time.

* FIX timer_irq_works() - used a 'unsigned int' to store jiffies value