platform: qemu/virt: Fix up DT for reserved memory

This calls fdt_reserved_memory_fixup() helper in the platform's
final_init() routine.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>

platform/qemu/virt/platform.c

@@ -49,6 +49,8 @@ static int virt_final_init(bool cold_boot)
 	fdt = sbi_scratch_thishart_arg1_ptr();
 	fdt_plic_fixup(fdt, "riscv,plic0");
 
+	fdt_reserved_memory_fixup(fdt);
+
 	return 0;
 }