White Rabbit MCH Vectored Interrupt Controller driver
------


This driver adds support for the Interrupt Controller in the main FPGA of White Rabbit MCH. The VIC multiplexes 32 source interrupts
into single interrupt CPU interrupt line (AT91SAM9263_ID_IRQ0).


exported functions:
---------------------


void wrmch_vic_free_irq(int irq, void *dev_id);
int wrmch_vic_request_irq(int irq, wrvic_irq_t handler, void *dev_id);
void wrmch_vic_enable_irq(int irq);
void wrmch_vic_disable_irq(int irq);

dev_id = private data of requesting device/driver.