The pyverbs test suite generates a few dmesg traces from intentional error
tests. This patch replaces those messages with pr_debug() calls which
improves the usefullness of the tests.

Link: https://lore.kernel.org/r/20220630190425.2251-3-rpearsonhpe@gmail.comSigned-off-by: NBob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>