ARM: dts: at91: sam9x60-curiosity: Sync gpio button from Linux

Copied as is from Linux Kernel release v6.4.
(dts file is still the same in Linux v6.5-rc7 but was moved to vendor
sub-directories with v6.5-rc1.)

Button works out of the box now if the following config options are
enabled: CONFIG_BUTTON, CONFIG_BUTTON_GPIO, CONFIG_CMD_BUTTON,
CONFIG_DM_GPIO.

Signed-off-by: Alexander Dahl <ada@thorsis.com>