Fix embedded PowerPC watchdog and timers
Fix PowerPC 405 SPR
Add generic PowerPC 405 core instanciation code + resets support.
Implement simple peripherals shared by most PowerPC 405 implementations
PowerPC 405 EC & EP microcontrollers preliminary support


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2690 c046a42c-6fe2-441c-8c8c-71466251a162