autoport: Add a license header to non-empty files

Change-Id: I8078d8babf24feabb22856ee820ab45b7d466f62
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45464
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/autoport/ec_none.go

@@ -4,6 +4,7 @@ func NoEC(ctx Context) {
 	ap := Create(ctx, "acpi/platform.asl")
 	defer ap.Close()
 
+	Add_gpl(ap)
 	ap.WriteString(
 		`Method(_WAK, 1)
 {