Merge branch 'net-urb-alloc-failure'

Wolfram Sang says:

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net: don't print error when allocating urb fails

This per-subsystem series is part of a tree wide cleanup. usb_alloc_urb() uses
kmalloc which already prints enough information on failure. So, let's simply
remove those "allocation failed" messages from drivers like we did already for
other -ENOMEM cases. gkh acked this approach when we talked about it at LCJ in
Tokyo a few weeks ago.
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Signed-off-by: David S. Miller <davem@davemloft.net>