infinibad: weird APIs switched to ->write_iter()

	Things Not To Do When Writing A Driver, part 1001st:
have writev() and write() on the same file doing completely
different things.  As in, "interpret very different sets of
commands".

	We _can_ handle that, but it's a bloody bad idea.
Don't do that in new drivers.  Ever.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --cc drivers/infiniband/hw/ipath/ipath_file_ops.c
Simple merge

diff --cc drivers/infiniband/hw/qib/qib_file_ops.c
Simple merge