When the user overrides the DSDT, replace any SSDTs with a simple no-op table.  acpidump(8) concatenates the body of the DSDT and SSDTs so an edited ASL will contain all the necessary information.  We can't use a completely empty table since ACPI-CA reports this as a problem.
When the user overrides the DSDT, replace any SSDTs with a simple no-op
table.  acpidump(8) concatenates the body of the DSDT and SSDTs so an
edited ASL will contain all the necessary information.  We can't use a
completely empty table since ACPI-CA reports this as a problem.

MFC after:	3 days

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