arm64: dts: imx8mm-verdin: only dashes in node names

Make sure we only have dashes rather than underscores in node names by
renaming ctrl_sleep_moci-hog to ctrl-sleep-moci-hog.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>