gpio: s5p: increment bank base address only if bank is initialized

gpio: s5p: increment bank base address only if bank is initialized

There is a condition guard which ensures that the GPIO node, indeed
describes a GPIO controller.

	if (!fdtdec_get_bool(blob, node, "gpio-controller"))
		continue;

Since the bank base is being incremented in the loop, it is done so
irrespective of whether the node is a GPIO controller or not. This leads
to the incorrect resolution of bank base addresses.

Move it out of the loop, and instead increment the bank base address
only if the driver successfully binds a GPIO controller.

Reviewed-by: Henrik Grimler <henrik@grimler.se>
Fixes: b8809e60cdb5 ("dm: exynos: gpio: Convert to driver model")
Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>