virt: vmgenid: recognize new CID added by Hyper-V

In the Windows spec for VM Generation ID, the originally specified CID
is longer than allowed by the ACPI spec. Hyper-V has added "VMGENCTR" as
a second valid CID that is conformant, while retaining the original CID
for compatibility with Windows guests.

Add this new CID to the list recognized by the driver.

Signed-off-by: Michael Kelley <[e-mail]>
Signed-off-by: Jason A. Donenfeld <[e-mail]>

drivers/virt/vmgenid.c

···
 }
 
 static const struct acpi_device_id vmgenid_ids[] = {
+	{ "VMGENCTR", 0 },
 	{ "VM_GEN_COUNTER", 0 },
 	{ }
 };