c-common.c (c_common_nodes_and_builtins): Replace use of TARGET_ENUM_VA_LIST by target hook enum_va_list.

2010-05-28  Kai Tietz  <kai.tietz@onevision.com>

        * c-common.c (c_common_nodes_and_builtins): Replace use
        of TARGET_ENUM_VA_LIST by target hook enum_va_list.
        * config/i386/i386.c (TARGET_ENUM_VA_LIST_P): Hook
        to ix86_enum_va_list.
        * config/i386/i386.h (TARGET_ENUM_VA_LIST): Removed.
        * doc/tm.texi (TARGET_ENUM_VA_LIST): Removed.
        (TARGET_ENUM_VA_LIST_P): Add hook description.
        * target-def.h (TARGET_ENUM_VA_LIST_P): Added.
        * target.h (gcc_target): Add enum_va_list hook.

From-SVN: r159966