net: ethernet: ti: am65-cpsw: Fix PM runtime leakage in am65_cpsw_nuss_ndo_slave_open()

Ensure pm_runtime_put() is issued in error path.

Reported-by: Jakub Kicinski <kuba@kernel.org>
Fixes: 93a76530

 ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Saeed Mahameed <saeed@kernel.org>
Link: https://lore.kernel.org/r/20221208105534.63709-1-rogerq@kernel.org


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