Support for powerpc-xilinx-eabi BSP

[Jeff Johnston]

Michael Eager wrote:
> Joel Sherrill wrote:
>> Michael Eager wrote:
>>> Attached is a patch which configures newlib for the
>>> Xilinx PowerPC 405/440 BSP, when _XMK__ is defined.
>>>
>>>   
>> If someone doesn't mind, please add RTEMS
>> to the conditional for PTHREAD_MUTEX_NORMAL,
>> etc.  It was on my list to add these so the
>> first step is now done. :)
>>
>> The others are just alternatives for XMK.
>
> Here is an updated patch which adds __rtems__.
>
Patch checked in.

-- Jeff J.