[SPARC64]: Oops in pci_alloc_consistent with cingergyT2

From: Guido Guenther <agx@sigxcpu.org>

- Use correct API for allocating and freeing DMA buffers.

Acked-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>