Comment 7 for bug 1452875

Uploaded, with one minor change agreed with Manoj on IRC: on not finding /proc/device-tree/model, no warning is printed, as this is the common case on Intel (and I want to avoid risking alarming users via eg. logcheck).

I'll leave it to the SRU team to decide on whether it's OK to fix Trusty without fixing Wily, but Manoj's justification sounds OK to me (that the vendor has essentially EOL'd it beyond Trusty).

As well as checking on the affected hardware, please make sure that Intel hasn't regressed during SRU verification (eg. just check that irqbalance is running and functioning on Intel maybe?).