* config/alpha/alpha.c (alpha_sa_size): Force procedure type to
PT_STACK when frame_pointer_needed on OpenVMS.
(alpha_pv_save_size, alpha_using_fp): Remove.
(alpha_vms_can_eliminate): New function. Support for CAN_ELIMINATE
with proper processing for PT_NULL.
(alpha_vms_initial_elimination_offset): New function. Support for
INITIAL_ELIMINATION_OFFSET with proper processing for PT_NULL.
(alpha_sa_size): Force procedure type to PT_STACK when
frame_pointer_needed on OpenVMS.
* config/alpha/alpha-protos.h (alpha_pv_save_size): Remove prototype.
(alpha_using_fp): Likewise.
(alpha_vms_can_eliminate): Add prototype.
(alpha_vms_initial_elimination_offset): Likewise.
* config/alpha/vms.h (CAN_ELIMINATE, INITIAL_ELIMINATION_OFFSET):
Call alpha_vms_can_eliminate and alpha_vms_initial_elimination_offset.