ACPI: EC: Rewrite DMI checks

Use dmi_check_system() for DMI matching.
Don't use string "Notebook" for matching MSI hardware.

http://bugzilla.kernel.org/show_bug.cgi?id=14081



Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>