Merge branch 'net-gro-gro_drop-deprecation'

Eric Dumazet says:

====================
net-gro: GRO_DROP deprecation

GRO_DROP has no practical use and can be removed,
once ice driver is cleaned up.

This removes one useless conditional test in napi_gro_frags().
====================

Link: https://lore.kernel.org/r/20210108113903.3779510-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>