[trusty/linux artful/linux] CVE-2018-5750 -- raw pointer in diagnostics

[Andy Whitcroft]

CVE-2018-5750:
	Wang Qize discovered that an information disclosure vulnerability
	existed in the SMBus driver for ACPI Embedded Controllers in the
	Linux kernel. A local attacker could use this to expose sensitive
	information (kernel pointer addresses).

Cherrypicked this simple fix back to artful and trusty.  Other series
have this via stable and upstream.

Proposing for SRU to trusty and artful.

-apw