spapr: Remove unnecessary instance_size specifications from DRC subtypes

All the DRC subtypes explicitly list instance_size in TypeInfo (all as
sizeof(sPAPRDRConnector).  This isn't necessary, since if it's not listed
it will be derived from the parent type.

Worse, this is dangerous, because if a subtype is changed in future to
have a larger structure, then subtypes of that subtype also need to have
instance_size changed, or it will lead to hard to track memory corruption
bugs.
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

hw/ppc/spapr_drc.c

@@ -653,7 +653,6 @@ static const TypeInfo spapr_dr_connector_info = {
 static const TypeInfo spapr_drc_physical_info = {
     .name          = TYPE_SPAPR_DRC_PHYSICAL,
     .parent        = TYPE_SPAPR_DR_CONNECTOR,
-    .instance_size = sizeof(sPAPRDRConnector),
     .class_init    = spapr_drc_physical_class_init,
     .abstract      = true,
 };
@@ -661,7 +660,6 @@ static const TypeInfo spapr_drc_physical_info = {
 static const TypeInfo spapr_drc_logical_info = {
     .name          = TYPE_SPAPR_DRC_LOGICAL,
     .parent        = TYPE_SPAPR_DR_CONNECTOR,
-    .instance_size = sizeof(sPAPRDRConnector),
     .class_init    = spapr_drc_logical_class_init,
     .abstract      = true,
 };
@@ -669,21 +667,18 @@ static const TypeInfo spapr_drc_logical_info = {
 static const TypeInfo spapr_drc_cpu_info = {
     .name          = TYPE_SPAPR_DRC_CPU,
     .parent        = TYPE_SPAPR_DRC_LOGICAL,
-    .instance_size = sizeof(sPAPRDRConnector),
     .class_init    = spapr_drc_cpu_class_init,
 };
 
 static const TypeInfo spapr_drc_pci_info = {
     .name          = TYPE_SPAPR_DRC_PCI,
     .parent        = TYPE_SPAPR_DRC_PHYSICAL,
-    .instance_size = sizeof(sPAPRDRConnector),
     .class_init    = spapr_drc_pci_class_init,
 };
 
 static const TypeInfo spapr_drc_lmb_info = {
     .name          = TYPE_SPAPR_DRC_LMB,
     .parent        = TYPE_SPAPR_DRC_LOGICAL,
-    .instance_size = sizeof(sPAPRDRConnector),
     .class_init    = spapr_drc_lmb_class_init,
 };