net/mlx5: E-Switch, Fix switching to switchdev mode with IB device disabled

In case that IB device is already disabled when moving to switchdev mode,
which can happen when working with LAG, need to do rescan_drivers()
before leaving in order to add ethernet representor auxiliary device.

Fixes: ab85ebf4 ("net/mlx5: E-switch, refactor eswitch mode change")
Signed-off-by: Patrisious Haddad <phaddad@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20241203204920.232744-4-tariqt@nvidia.com


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