ARM: dts: sti: move some nodes out of the soc section in stih407-family.dtsi

Move all nodes without reg property out of the soc section of
stih407-family.dtsi and DT including stih407-family.dtsi.
This avoid to set a <0> reg property.

Signed-off-by: Alain Volmat <avolmat@me.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>