Create an IOMemoryDescriptor to describe one physical range.
The physical address of the first byte in the memory.
The length of memory.
An I/O direction to be associated with the descriptor, which may affect the operation of the prepare and complete methods on some architectures.
The created IOMemoryDescriptor on success, to be released by the caller, or zero on failure.
This method creates and initializes an IOMemoryDescriptor for memory consisting of a single physical memory range.