anchor.diff:  interrupt tree reaches an interrupt controller node without an
   interrupts property and thus no explicit interrupt parent.
   
  -See Figure 2-5 for an example of a graphical representation of a device tree with interrupt parent
  -relationships shown. Figure 2-6 shows the corresponding interrupt tree.
  +See Figure 2-5 for an example of a graphical representation of a device
  +tree with interrupt parent relationships shown. Figure 2-6 shows the
  +corresponding interrupt tree.
   
   .Figure 2-5 Device Tree
   ----
  
positive.code: component is described by the #interrupt-cells property of this node—the
  nexus node containing the interrupt-map property.
  
  interrupt-parent:: A single <phandle> value that points to the interrupt parent to
  which the child domain is being mapped.
  
  parent unit address:: The unit address in the domain of the interrupt
  parent. The number of 32-bit cells required to specify this address is
  
negative.code: it might become operational in the future (for example, something is not
  plugged in, or switched off).
  
  Refer to the device binding for details on what disabled means for a
  given device.
  
  |“fail” |Indicates that the device is not operational. A serious error
  was detected in the device, and it is unlikely to become operational
  