dmaengine: hsu: pci: switch to new API for IRQ allocation

There is new API in place which provides allocation mechanism of interrupts for
PCI devices. Use it in the HSU DMA driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>