Mark Pizzolato b1766b6dcf VAX8200: Fix access to watch chip wtc_rd() and wtc_wr() ...

- Recent changes in vax_watch.c changed the input parameter from a
  physical address to a register address within the watch chip.
- vax630_sysdev.c called the older wtc_wr() with the new parameter,
  but the length argument has been removed.
- The watch chip never starts as valid.  Make it valid when the TODR is
  attached (i.e. reflecting a connected battery).
- 64 bytes of bus addresses for the watch chip can sometimes be dispatched
  to wtc_rd() and wtc_wr().  Make sure that reasonable memory is always
  referenced for all potential accesses.
- restore vax8200 to makefile which got lost in a prior merge.

2019-04-23 10:41:10 -07:00

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