selftests: mlxsw: mirror_gre: Simplify

After the previous patch, the function test_span_failable() is always
called with should_fail=1. Drop the argument and streamline the code.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Danielle Ratson <danieller@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2024-06-27 16:48:45 +02:00 • committed by David S. Miller
commit 388b2d985a