Supply regulators are common across different variants of vmarc SOM's
since the Type C power controller IC is part of the carrier board.

So, move the supply regulators into carrier board dtsi.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Link: https://lore.kernel.org/r/20200715083418.112003-4-jagan@amarulasolutions.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>