ARM: dts: omap-embt2ws: system-power-controller for bt200

Configure the TWL6032 as system power controller to let the device
power off.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Message-ID: <20240217082007.3238948-4-andreas@kemnade.info>
Signed-off-by: Tony Lindgren <tony@atomide.com>