MIPS: BCM47XX: Convert buttons to software nodes

Convert the legacy gpio-keys platform device on BCM47XX boards to
use software nodes/properties. This allows us to describe the GPIO
keys and their GPIO bindings using software nodes, so that support
for platform data can eventually be removed from the gpio-keys
driver.

Detect the active bus type (BCMA or SSB) and reference the
corresponding GPIO controller's software node (bcma_gpio_swnode or
ssb_gpio_swnode) in the button properties.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Assisted-by: Antigravity:gemini-3.5-flash
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

0 files changed, 0 insertions, 0 deletions