gpio: bcm-kona: Fix return value of bcm_kona_gpio_probe()

gpio: bcm-kona: Fix return value of bcm_kona_gpio_probe()

BugLink: https://bugs.launchpad.net/bugs/1881927
[ Upstream commit 98f7d1b15e87c84488b30ecc4ec753b0690b9dbf ]

Propagate the error code returned by devm_platform_ioremap_resource()
out of probe() instead of overwriting it.

Fixes: 72d8cb715477 ("drivers: gpio: bcm-kona: use devm_platform_ioremap_resource()")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
[Bartosz: tweaked the commit message]
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>