xen: arm: implement generic multiboot compatibility strings

This causes Xen to accept the more generic names specified in
http://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions/Multiboot as of
2014-06-06.

These names are more generic than those proposed by Andre in
http://thread.gmane.org/gmane.linux.linaro.announce.boot/326 and those
used in earlier drafts of the /Multiboot wiki page.

This will allow bootloaders to not special case Xen (or at least to reduce
the amount which is required).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Julien Grall <julien.grall@linaro.org>

xen/common/device_tree.c

@@ -340,9 +340,11 @@ static void __init process_multiboot_node(const void *fdt, int node,
     struct dt_mb_module *mod;
     int len;
 
-    if ( fdt_node_check_compatible(fdt, node, "xen,linux-zimage") == 0 )
+    if ( fdt_node_check_compatible(fdt, node, "xen,linux-zimage") == 0 ||
+         fdt_node_check_compatible(fdt, node, "multiboot,kernel") == 0 )
         nr = MOD_KERNEL;
-    else if ( fdt_node_check_compatible(fdt, node, "xen,linux-initrd") == 0)
+    else if ( fdt_node_check_compatible(fdt, node, "xen,linux-initrd") == 0 ||
+              fdt_node_check_compatible(fdt, node, "multiboot,ramdisk") == 0 )
         nr = MOD_INITRD;
     else if ( fdt_node_check_compatible(fdt, node, "xen,xsm-policy") == 0 )
         nr = MOD_XSM;
@@ -435,7 +437,8 @@ static int __init early_scan_node(const void *fdt,
 {
     if ( device_tree_node_matches(fdt, node, "memory") )
         process_memory_node(fdt, node, name, address_cells, size_cells);
-    else if ( device_tree_node_compatible(fdt, node, "xen,multiboot-module" ) )
+    else if ( device_tree_node_compatible(fdt, node, "xen,multiboot-module" ) ||
+              device_tree_node_compatible(fdt, node, "multiboot,module" ))
         process_multiboot_node(fdt, node, name, address_cells, size_cells);
     else if ( depth == 1 && device_tree_node_matches(fdt, node, "chosen") )
         process_chosen_node(fdt, node, name, address_cells, size_cells);