We still don't use it (in the tool stack), and its values (plural) also
aren't fetched correctly, but it is odd to continue to see the
hypervisor log "ELF: note: unknown (0xd)" when loading a Linux Dom0.

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/common/libelf/libelf-dominfo.c
+++ b/xen/common/libelf/libelf-dominfo.c
@@ -117,6 +117,7 @@ elf_errorstatus elf_xen_parse_note(struc
         [XEN_ELFNOTE_FEATURES] = { "FEATURES", 1},
         [XEN_ELFNOTE_SUPPORTED_FEATURES] = { "SUPPORTED_FEATURES", 0},
         [XEN_ELFNOTE_BSD_SYMTAB] = { "BSD_SYMTAB", 1},
+        [XEN_ELFNOTE_L1_MFN_VALID] = { "L1_MFN_VALID", false },
         [XEN_ELFNOTE_SUSPEND_CANCEL] = { "SUSPEND_CANCEL", 0 },
         [XEN_ELFNOTE_MOD_START_PFN] = { "MOD_START_PFN", 0 },
         [XEN_ELFNOTE_PHYS32_ENTRY] = { "PHYS32_ENTRY", 0 },