* config/alpha/alpha.h (TARGET_ABI_OSF): New.
        (TARGET_ABI_WINDOWS_NT, TARGET_ABI_OPEN_VMS): Rename; update users.
        * config/alpha/alpha-protos.h: Update TARGET_ABI_* users.
        * config/alpha/alpha.c: Likewise.
        * config/alpha/alpha.md: Likewise.
        * config/alpha/alpha32.h: Likewise.
        * config/alpha/vms.h: Likewise.
        (OPEN_VMS): Remove.

From-SVN: r44016