Got rid of some typedefs, moved the tlbs to the base o3 cpu, and called the architect...

Got rid of some typedefs, moved the tlbs to the base o3 cpu, and called the architecture defined setSyscallReturn function instead of a duplicate copy.

src/cpu/o3/alpha/cpu.hh:
    Got rid of some typedefs, and moved the tlbs to the base o3 cpu.
src/cpu/o3/alpha/thread_context.hh:
src/cpu/o3/cpu.cc:
    Moved the tlbs to the base o3 cpu.

--HG--
extra : convert_revision : 1805613aa230b8974a226ee3d2584c85f7a578aa