Add initial support for Ingenic X1000 SoC and Y&A CU Neo board.

[Zhou Yanjie]

1.Add initial Ingenic X1000 SoC support. Provide minimum necessary
  information to boot kernel to an initramfs userspace.
2.CU Neo is a development board using Ingenic X1000/X1000E SoC. It
  comes with either 32MiB/64MiB of RAM. Add initial support for
  CU Neo development board.