Subject: x86_64: remove an inapplicable feature flag

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/arch/x86_64/kernel/head-xen.S
+++ b/arch/x86_64/kernel/head-xen.S
@@ -206,6 +206,6 @@
	ELFNOTE(Xen, XEN_ELFNOTE_ENTRY,          .quad,  startup_64)
 	ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .quad,  hypercall_page)
 	ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,   .quad,  _PAGE_PRESENT,_PAGE_PRESENT)
-	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|pae_pgdir_above_4gb|supervisor_mode_kernel")
+	ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,       .asciz, "writable_page_tables|writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel")
 	ELFNOTE(Xen, XEN_ELFNOTE_LOADER,         .asciz, "generic")
 	ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long,  1)