Initial changes to allowed DetailedCPU to work with other architectures (i.e. Sparc...

Initial changes to allowed DetailedCPU to work with other architectures (i.e. Sparc & MIPS)

Still need to add some code to fetch & commit stages

src/cpu/o3/commit.hh:
src/cpu/o3/cpu.cc:
src/cpu/o3/cpu.hh:
    Add nextNPC read & set functions
src/cpu/o3/fetch.hh:
src/cpu/o3/fetch_impl.hh:
    Add nextNPC

--HG--
extra : convert_revision : 120677547d54091411399156bd066ce5baf785f7