Add comments, including restoring the PIIX4 errata comment, to indicate what the ACPI-safe workaround is intended to fix.  Requested by phk.
Add comments, including restoring the PIIX4 errata comment, to indicate
what the ACPI-safe workaround is intended to fix.  Requested by phk.

Set the bushandle and tag when attaching the timer, don't do it each time
in read_counter().  Pointed out by bde.

Move test_counter() to the end.  Staticize acpi_timer_reg.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase