net: vxlan: Fix kernel coding style

The continuation line does not align with the opening bracket
and this patch fix it.

Signed-off-by: Alaa Mohamed <eng.alaamohamedsoliman.am@gmail.com>
Link: https://lore.kernel.org/r/20220520003614.6073-1-eng.alaamohamedsoliman.am@gmail.com


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