ppc/spapr: fix default cpu for pre-9.0 machines.

When POWER10 CPU was made as default, we missed keeping POWER9 as
default for older pseries releases (pre-9.0) at that time.
This caused breakge in default cpu evaluation for older pseries
machines and hence this fix.

Fixes: 5111301 ("ppc/spapr: change pseries machine default to POWER10 CPU")
Cc: [email protected]
Signed-off-by: Harsh Prateek Bora <[email protected]>
Reviewed-by: Daniel P. Berrangé <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Message-ID: <[email protected]>
Signed-off-by: Nicholas Piggin <[email protected]>

Author: Harsh Prateek Bora

hw/ppc/spapr.c

@@ -4816,6 +4816,7 @@ static void spapr_machine_8_2_class_options(MachineClass *mc)
 {
     spapr_machine_9_0_class_options(mc);
     compat_props_add(mc->compat_props, hw_compat_8_2, hw_compat_8_2_len);
+    mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power9_v2.2");
 }
 
 DEFINE_SPAPR_MACHINE(8, 2);