aix.h (TARGET_ALTIVEC_VRSAVE): Delete.

aix.h (TARGET_ALTIVEC_VRSAVE): Delete.

        * config/rs6000/aix.h (TARGET_ALTIVEC_VRSAVE): Delete.
        * config/rs6000/rs6000.c (rs6000_explicit_options): Add
        aix_struct_ret.
        (rs6000_override_options): Do not protect TARGET_ALTIVEC_VRSAVE.
        Modify aix_struct_return variable, not target_flags.
        (rs6000_handle_option): Do not protect TARGET_ALTIVEC_VRSAVE.
        (rs6000_return_in_memory): Test aix_struct_return.
        * config/rs6000/rs6000.opt (maix-struct-return): Convert to
        independent variable.  Report mxl-compat.

From-SVN: r99831