x86: remove ifdef CONFIG_SWIOTLB in pci-dma.c

As other IOMMUs do, this puts dummy pci_swiotlb_init() in swiotlb.h
and remove ifdef CONFIG_SWIOTLB in pci-dma.c.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2 files changed