arm64: dmi: set DMI string as dump stack arch description

This sets the DMI string, containing system type, serial number,
firmware version etc. as dump stack arch description, so that oopses
and other kernel stack dumps automatically have this information
included, if available.
Tested-by: NLeif Lindholm <leif.lindholm@linaro.org>
Acked-by: NLeif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>

arch/arm64/kernel/efi.c

@@ -479,6 +479,8 @@ static int __init arm64_dmi_init(void)
 	 * itself, depends on dmi_scan_machine() having been called already.
 	 */
 	dmi_scan_machine();
+	if (dmi_available)
+		dmi_set_dump_stack_arch_desc();
 	return 0;
 }
 core_initcall(arm64_dmi_init);