Move most of the timer interrupt related PPC code to ppc_lib/interrupts.c
* Patch by Anders Larsen, 17 Sep 2003:
Bring ARM memory layout in sync with the documentation:
stack and malloc-heap are now located _below_ the U-Boot code
fix TI Innovator/OMAP1510 pin configs
* Patches by Kshitij, 18 Aug 2003
- add support for arm926ejs cpu core
- add support for TI OMAP 1610 Innovator Board