dmabrg_request_irq
EXPORT_SYMBOL_GPL(dmabrg_request_irq);
extern int dmabrg_request_irq(unsigned int, void(*)(void *), void *);
ret = dmabrg_request_irq(dmairq, camelot_rxdma, cam);
(void)dmabrg_request_irq(dmairq + 1,camelot_rxdma, cam);
ret = dmabrg_request_irq(dmairq, camelot_txdma, cam);
(void)dmabrg_request_irq(dmairq + 1, camelot_txdma, cam);