Merge branch 'mlxsw-Two-small-updates'

Ido Schimmel says:

====================
mlxsw: Two small updates

Patch #1 from Petr handles a corner case in GRE tunnel offload.

Patch #2 from Amit fixes a recent issue where the driver was programming
the device to use an adjacency index (for a nexthop) that was not
properly initialized.
====================

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>