hw/riscv/virt: Free the test device tree node name

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>

hw/riscv/virt.c

@@ -240,6 +240,7 @@ static void *create_fdt(RISCVVirtState *s, const struct MemmapEntry *memmap,
     qemu_fdt_setprop_cells(fdt, nodename, "reg",
         0x0, memmap[VIRT_TEST].base,
         0x0, memmap[VIRT_TEST].size);
+    g_free(nodename);
 
     nodename = g_strdup_printf("/uart@%lx",
         (long)memmap[VIRT_UART0].base);