arm64: tegra: p2597: Fix gpio for vdd-1v8-dis regulator

arm64: tegra: p2597: Fix gpio for vdd-1v8-dis regulator

[ Upstream commit f34621f31e3be81456c903287f7e4c0609829e29 ]

According to the board schematics the enable pin of this regulator is
connected to gpio line #9 of the first instance of the TCA9539
GPIO expander, so adjust it.

Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Link: https://lore.kernel.org/r/20250224-diogo-gpio_exp-v1-1-80fb84ac48c6@tecnico.ulisboa.pt
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>