gpio: tegra186: Force one interrupt per bank

[ Upstream commit ca038748 ]

Newer chips support up to 8 interrupts per bank, which can be useful to
balance the load and decrease latency. However, it also required a very
complicated interrupt routing to be set up. To keep things simple for
now, ensure that a single interrupt per bank is enforced, even if all
possible interrupts are described in device tree.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Stable-dep-of: 8323f3a6 ("gpio: tegra186: fix resource handling in ACPI probe path")
Signed-off-by: Sasha Levin <sashal@kernel.org>