autoport: move the generated gnvs.c to acpi_tables.c

Change-Id: I8f6eea579f69060608639b1c50255acd8ab5a4a2
Signed-off-by: Iru Cai <mytbk920423@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30889
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

util/autoport/main.go

@@ -789,10 +789,6 @@ func main() {
 		}
 	}
 
-	at := Create(ctx, "acpi_tables.c")
-	defer at.Close()
-	at.WriteString("/* dummy */\n")
-
 	bi := Create(ctx, "board_info.txt")
 	defer bi.Close()