s390: do not touch sie64a.S with duplicate include removal

This is a partial revert of  e44ba033 ("treewide: remove duplicate
includes").

The file is gone in s390 tree and will not exist any more.
Reported-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

arch/s390/kvm/sie64a.S

@@ -14,6 +14,7 @@
 #include <linux/errno.h>
 #include <asm/asm-offsets.h>
 #include <asm/setup.h>
+#include <asm/asm-offsets.h>
 #include <asm/ptrace.h>
 #include <asm/thread_info.h>