[IA64] efi.c Add /* never reached */ annotation

As written, this loop could be for (;;) instead of do while (md). The tests
inside the loop always result in a return so the loop never terminates normally.

Signed-off-by: Aron Griffis <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/kernel/efi.c

···
 		if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr)
 			return 0;
 	} while (md);
-	return 0;
+	return 0;	/* never reached */
 }
 
 u64
···
 		if (!md || md->attribute != attr)
 			return 0;
 	} while (md);
-	return 0;
+	return 0;	/* never reached */
 }
 EXPORT_SYMBOL(kern_mem_attribute);