ppc/spapr: remove deprecated machine pseries-2.12-sxxm

Commit 0cac0f1b964 marked pseries-2.12 machines as deprecated
with reasons mentioned in its commit log.
Removing pseries-2.12-sxxm specific code with this patch.

Suggested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

hw/ppc/spapr.c

@@ -4731,8 +4731,6 @@ static void spapr_machine_latest_class_options(MachineClass *mc)
     DEFINE_SPAPR_MACHINE_IMPL(true, major, minor)
 #define DEFINE_SPAPR_MACHINE(major, minor) \
     DEFINE_SPAPR_MACHINE_IMPL(false, major, minor)
-#define DEFINE_SPAPR_MACHINE_TAGGED(major, minor, tag) \
-    DEFINE_SPAPR_MACHINE_IMPL(false, major, minor, _, tag)
 
 /*
  * pseries-9.2
@@ -5042,18 +5040,6 @@ static void spapr_machine_2_12_class_options(MachineClass *mc)
 
 DEFINE_SPAPR_MACHINE(2, 12);
 
-static void spapr_machine_2_12_sxxm_class_options(MachineClass *mc)
-{
-    SpaprMachineClass *smc = SPAPR_MACHINE_CLASS(mc);
-
-    spapr_machine_2_12_class_options(mc);
-    smc->default_caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_WORKAROUND;
-    smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_WORKAROUND;
-    smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_FIXED_CCD;
-}
-
-DEFINE_SPAPR_MACHINE_TAGGED(2, 12, sxxm);
-
 static void spapr_machine_register_types(void)
 {
     type_register_static(&spapr_machine_info);