(vax_extract_return_value): Ditto.
(vax_store_return_value): Ditto.
(vax_extract_struct_value_address): Ditto.
* config/vax/tm-vax.h (STORE_STRUCT_RETURN): Use
vax_store_struct_return.
(EXTRACT_RETURN_VALUE): Use vax_extract_return_value.
(STORE_RETURN_VALUE): Use vax_store_return_value.
(EXTRACT_STRUCT_VALUE_ADDRESS): Use vax_extract_struct_value_address.
(vax_frame_args_address_correct): Ditto.
(vax_frame_args_address): Ditto.
(vax_frame_locals_address): Ditto.
(vax_frame_num_args): Move code to be in proximity to
other frame-related functions.
* config/vax/tm-vax.h (INNER_THAN): Use core_addr_lessthan.
(FRAME_SAVED_PC): Use vax_frame_saved_pc.
(FRAME_ARGS_ADDRESS_CORRECT): Use vax_frame_args_address_correct.
(FRAME_ARGS_ADDRESS): Use vax_frame_args_address.
(FRAME_LOCALS_ADDRESS): Use vax_frame_locals_address.