Merge branch 'net-devlink-return-the-driver-name-in-devlink_nl_info_fill'

Vincent Mailhol says:

====================
net: devlink: return the driver name in devlink_nl_info_fill

The driver name is available in device_driver::name. Right now,
drivers still have to report this piece of information themselves in
their devlink_ops::info_get callback function.

The goal of this series is to have the devlink core to report this
information instead of the drivers.

The first patch fulfills the actual goal of this series: modify
devlink core to report the driver name and clean-up all drivers. Both
have to be done in an atomic change to avoid attribute
duplication. This same patch also removes the
devlink_info_driver_name_put() function to prevent future drivers from
reporting the driver name themselves.

The second patch allows the core to call devlink_nl_info_fill() even
if the devlink_ops::info_get() callback is NULL. This leads to the
third and final patch which cleans up the drivers which have an empty
info_get().
====================

Link: https://lore.kernel.org/r/20221129095140.3913303-1-mailhol.vincent@wanadoo.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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