[Linaro-acpi] Simple ACPI Boot Tests

For card LEG-583 I needed some simple ACPI tests to check that we have booted with ACPI support and have probably not corrupted the tables.

I think the attached script should do it if anyone has any comments. Next I need to see how to get this into a LAVA test.

Tests:-

1) Check presence of /sys/firmware/acpi 2) Check presence of /sys/firmware/acpi/tables/DSDT 3) If iasl is installed test decompile of /sys/firmware/acpi/tables/DSDT

I think this is simple enough to be a boot test but enough confidence that the bootloader correctly passed us some tables?

iasl should thanks to Naresh be part of released OE images soon.

Thanks

Graeme