ACPI: EC: add another DMI check for ASUS hardware

Commit 0adf3c74 introduced a regression
by making the ECDT validation test for ASUS hardware more restrictive.
The previous test used the dmi_name_in_vendors function which searches
a number of DMI fields, while the new test checked only the BIOS
vendor, which is known to not match on an ASUS F5GL laptop which
requires ECDT validation.

Add a rule to ec_dmi_table based on an alternative DMI pattern for
ASUS hardware as found elsewhere in the kernel.

Signed-off-by: Peter Collingbourne <peter@pcc.me.uk>
Signed-off-by: Len Brown <len.brown@intel.com>