PA2.0 stuff

[Jeffrey A Law]

I just pushed out a handful of PA2.0 related changes.

First, the assembler now knows about strict vs non-strict operand matching.

In a strict match, a register operand must start with a '%', or the operand
is deemed not to match (and thus we'll try the next insn in the table).

Given that support I pushed out a bunch of new syntax load/store instructions
(basically everything that did not require new completers or operands to be
defined).

I'll try to push out the remaining PA1.0/PA1.1 loads/stores using the
new syntax next.


jeff