s390x: add ptrace requests from linux v5.12

PTRACE_OLDSETOPTIONS is old, but it was missing, PTRACE_SYSEMU and
PTRACE_SYSEMU_SINGLESTEP are new, see

  linux commit 56e62a73702836017564eaacd5212e4d0fa1c01d
  s390: convert to generic entry

arch/s390x/bits/ptrace.h

@@ -1,4 +1,7 @@
 #define PTRACE_SINGLEBLOCK		12
+#define PTRACE_OLDSETOPTIONS		21
+#define PTRACE_SYSEMU			31
+#define PTRACE_SYSEMU_SINGLESTEP	32
 #define PTRACE_PEEKUSR_AREA		0x5000
 #define PTRACE_POKEUSR_AREA		0x5001
 #define PTRACE_GET_LAST_BREAK		0x5006