ARM: dts: logicpd-som-lv: Move pinmuxing to peripheral nodes

Move some pinmux references to their respective peripherals.
This keeps the pins in safe-mode until they are requested.

Signed-off-by: Adam Ford <aford173@gmail.com>
Message-Id: <20220303171818.11060-2-aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>