ARM: dts: exynos: Fix DTC unit name warnings in Exynos542x

Fix following DTC warnings in all Exynos542x/5800 boards:

Warning (unit_address_vs_reg): Node /video-phy@10040728 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /video-phy@10040714 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /usb@12000000 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /usb@12000000/dwc3 has a reg or ranges property, but no unit name
Warning (unit_address_vs_reg): Node /usb@12400000 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /usb@12400000/dwc3 has a reg or ranges property, but no unit name

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>