From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

From: Bryan Rittmeyer <bryan@staidm.org>

This patch adds preliminary support for the IBM PowerPC 750GX.  In summary
this part is a PPC750FX ramped to 1 GHz with a 1MB 4-way L2 and more
advanced I/O pipelining.  It is beginning to appear in embedded systems and
was rumored to be under evaluation inside Apple.  Tested on PVR 70020101;
please merge.

http://www-3.ibm.com/chips/techlib/techlib.nsf/products/PowerPC_750GX_Microprocessor