{aix43.h,aix5.1} (ASM_CPU_SPEC): Add power3 synonym for 630.

{aix43.h,aix5.1} (ASM_CPU_SPEC): Add power3 synonym for 630.

        * config/rs6000/{aix43.h,aix5.1} (ASM_CPU_SPEC): Add power3
        synonym for 630.  Add power4.  Remove embedded processors.  Use -m604
        assembler option.
        (CPP_CPU_SPEC): Add power3 and power4.
        (PROCESSOR_DEFAULT): Change to 604e.
        * config/rs6000/rs6000.h (ASM_CPU_SPEC): Similar additions.
        (CPP_CPU_SPEC): Similar additions.
        (enum process_type): Add POWER4.
        (RTX_COSTS): Add POWER4.
        (CPP_CPU_SPEC): Similar additions.
        * config/rs6000/linux64.h (PROCESSOR_DEFAULT): Define.
        * config/rs6000/rs6000.c (rs6000_override_options): Add power4.
        (rs6000_adjust_cost): Add 603, 604, 604e, 620, 630, Power4 to
        branch adjustment.
        (rs6000_issue_rate): Add Power4.
        * config/rs6000/rs6000.md (cpu attr): Add power4.
        (iu compare): Remove 604, 604e, 620, 630.
        Add basic Power4 scheduling information.
        (mfcr/mtcrf): Change type attribute to cr_logical.

From-SVN: r54405