32-bit PPC CPUs are reported based on 64-bit base CPU
When using the 64-bit target PPC binary, 32-bit CPUs are reported from 64-bit class.
Example G4 as 7400-powerpc64-cpu:
$ qemu-system-ppc64 -cpu g4 -S -monitor stdio -M none
QEMU 8.2.50 monitor - type 'help' for more information
(qemu) info qom-tree
/machine (none-machine)
/peripheral (container)
/peripheral-anon (container)
/unattached (container)
/device[0] (7400_v2.9-powerpc64-cpu)
/unnamed-gpio-in[0] (irq)
/unnamed-gpio-in[1] (irq)
/unnamed-gpio-in[2] (irq)
/unnamed-gpio-in[3] (irq)
/unnamed-gpio-in[4] (irq)
/unnamed-gpio-in[5] (irq)
/unnamed-gpio-in[6] (irq)
/unnamed-gpio-in[7] (irq)
/io[0] (memory-region)
/sysbus (System)
/system[0] (memory-region)
(qemu)