selftests: drv-net: psp: factor out creating a netkit in the test netns

The netkit removal test builds a disposable netkit pair and moves its
peer into the test namespace. The next commit needs a second associated
device there, so move that to a helper. No functional change, other
than looking the new peer up among all netkit devices rather than the
two the environment created, which is what makes it reusable.

Reviewed-by: Daniel Zahka <daniel.zahka@gmail.com>
Link: https://patch.msgid.link/20260912200426.121025-6-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions