Make device tree complete and consistent for pre relocation phase. Some nodes are missing, causing warnings to be issued on serial port probing during pre relocation phase (uclass_get_device_by_phandle_id fails when called by pinctrl_select_state_full: none of these failures is fatal nor causing issues). Add to *-u-boot.dtsi all required nodes with the 'bootph-some-ram' attribute. Signed-off-by: Massimo Pegorer <massimo.pegorer+oss@gmail.com> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>