net: fill in MODULE_DESCRIPTION()s for liquidio

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Cavium Liquidio.

Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240123190332.677489-4-leitao@debian.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>