U-Boot support for Orion SoCs

See our U-Boot main page.

• adapt orion5x / edminiv2 or relocation (wip in -next)
• add initial support for net5big (based upon reloc adaptation)
• add initial support for net2big (based upon reloc adaptation)
• add I2C support to net5big
• add PCI support to net5big
• add SATA over PCI support to net5big