[SCSI] qla1280: uses wrong failure path after failed pci_set_dma_mask

A failure here wouldn't currently free the irq; go to the irq free
path instead.

Signed-off-by: Johannes Dickgreber <tanzy@gmx.de>
Acked-by: Jes Sorensen <jes@sgi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>