* arch-utils.c (always_use_struct_convention): New function.

* arch-utils.c (always_use_struct_convention): New function.
* arch-utils.h (always_use_struct_convention): New prototype.
* alpha-tdep.c (alpha_use_struct_convention): Delete.
(alpha_gdbarch_init): Register always_use_struct_convention,
instead of alpha_use_struct_convention.
* cris-tdep.c (cris_use_struct_convention): Delete.
(cris_gdbarch_init): Register always_use_struct_convention,
instead of cris_use_struct_convention.
* frv-tdep.c (frv_use_struct_convention): Delete.
(frv_gdbarch_init): Register always_use_struct_convention,
instead of frv_use_struct_convention.
* h8300-tdep.c (h8300_use_struct_convention): Delete.
(h8300_gdbarch_init): Register always_use_struct_convention,
instead of h8300_use_struct_convention.
* mips_o32-tdep.c (mips_o32_use_struct_convention): Delete.
(mips_o32_gdbarch_init): Register always_use_struct_convention,
instead of mips_o32_use_struct_convention.