Change comment at top of swiotlb.c to reflect that the code is shared
with EM64T (i.e. Intel x86_64). Also add an entry for myself so that
if I "broke it", everyone knows who "bought it"... :-)
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NTony Luck <tony.luck@intel.com>