[POWERPC] Fix the node index confusion for SOC

    1) Defining child nodes of an SOC

    1) Defining child nodes of an SOC

    2) Representing devices without a current OF specification

    2) Representing devices without a current OF specification

      a) MDIO IO device

      a) MDIO IO device

      c) PHY nodes

      b) Gianfar-compatible ethernet nodes

      b) Gianfar-compatible ethernet nodes

      c) PHY nodes

      d) Interrupt controllers

      d) Interrupt controllers

      e) I2C

      e) I2C

      f) Freescale SOC USB controllers

      f) Freescale SOC USB controllers

      g) Freescale SOC SEC Security Engines

      g) Freescale SOC SEC Security Engines

      h) Board Control and Status (BCSR)

      h) Board Control and Status (BCSR)

      i) Freescale QUICC Engine module (QE)

      i) Freescale QUICC Engine module (QE)

      g) Flash chip nodes

      j) Flash chip nodes

      k) Global Utilities Block

      k) Global Utilities Block

  VII - Specifying interrupt information for devices

  VII - Specifying interrupt information for devices