Now that we have an U-Boot for RPI2, do not use the static DTB compiled
into the kernel, which is used mostly on early development stages.

On RPI(2) the DTB is loaded and modified by firmware and then handed to
kernel via U-Boot and ubldr.

The RPI firmware adds (or modify) a few valuable data to the in memory
DTB, like:

• System memory;
• Ethernet MAC address;
• framebuffer settings;
• Board serial and revision;
• clock-frequency for most of devices.