manual update from upstream:
authorTony Luck <tony.luck@intel.com>
Mon, 31 Oct 2005 18:51:57 +0000 (10:51 -0800)
committerTony Luck <tony.luck@intel.com>
Mon, 31 Oct 2005 18:51:57 +0000 (10:51 -0800)
Applied Al's change 06a544971fad0992fe8b92c5647538d573089dd4
to new location of swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

Trivial merge