xen/riscv: implement make_arch_nodes()

No RISC-V-specific nodes need to be created at the moment,
so make_arch_nodes() is implemented to simply return 0.

It is placed in dom0less-build.c as make_arch_nodes() is
only used in the dom0less code path. In the future, it will
be extended to create an emulated UART node.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/arch/riscv/dom0less-build.c

@@ -2,10 +2,18 @@
 
 #include <xen/bootfdt.h>
 #include <xen/device_tree.h>
+#include <xen/fdt-kernel.h>
 #include <xen/init.h>
 
 #include <asm/p2m.h>
 
+int __init make_arch_nodes(struct kernel_info *kinfo)
+{
+    /* No RISC-V specific nodes need to be made, at the moment. */
+
+    return 0;
+}
+
 int __init arch_parse_dom0less_node(struct dt_device_node *node,
                                     struct boot_domain *bd)
 {