Updates to support new interrupt processing and removal of PcPAL.

Updates to support new interrupt processing and removal of PcPAL.

src/arch/alpha/interrupts.hh:
    No need for this now that the ThreadContext is being used to set these IPRs in interrupts.
    Also split up the interrupt checking from the updating of the IPL and interrupt summary.
src/arch/alpha/tlb.cc:
    Check the PC for whether or not it's in PAL mode, not the addr.
src/cpu/o3/alpha/cpu.hh:
    Split up getting the interrupt from actually processing the interrupt.
src/cpu/o3/alpha/cpu_impl.hh:
    Splut up the processing of interrupts.
src/cpu/o3/commit_impl.hh:
    Update for ISA-oriented interrupt changes.
src/cpu/o3/fetch_impl.hh:
    Fix broken if statement from PcPAL updates, and properly populate the request fields.

    Also more debugging output.
src/cpu/ozone/cpu_impl.hh:
    Updates for ISA-oriented interrupt stuff.
src/cpu/ozone/front_end_impl.hh:
    Populate request fields properly.
src/cpu/simple/base.cc:
    Update for interrupt stuff.

--HG--
extra : convert_revision : 9bac3f9ffed4948ee788699b2fa8419bc1ca647c