Hello,

This patch combines CALL_DUMMY_STACK_ADJUST and 
CALL_DUMMY_STACK_ADJUST_P, which are both used by hand_function_call(), 
into a single DEPRECATED_CALL_DUMMY_STACK_ADJUST (with predicate).

The thing to notice in this patch is how it was only the SPARC that 
needed this (look at all the targets that disabled it), and then, even 
the SPARC could have handled this directly in PUSH_ARGUMENTS.

I'll commit this in a day or so,
Andrew