Changeset 6b4ca31 in rtems for c/src/lib/libbsp/m68k/gen68360/clock

Merged changes from Eric Norum:

Enable 68360 watchdog. The watchdog control register is a
`write-once' register, so the watchdog has to be enabled in the boot
roms if it is to be used at all. To make the change transparent I
added a default feed of the watchdog to the clock interrupt handler.
This can be overridden if the application wants to handle the
watchdog. The only difficulty with this change is that an
application has to either include the clock driver or handle the
watchdog explicitely. I don't think this is much of a problem since
I am pretty sure that almost every application includes the clock
driver.