gpio: tegra: Properly handle irq_set_irq_wake() error

Technically upstream interrupt controller may fail changing of GPIO's bank
wake-state and in this case the GPIO's wake-state shouldn't be changed.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>