hppa: replace cpu_hppa_init() with cpu_generic_init()

hppa: replace cpu_hppa_init() with cpu_generic_init()

drop custom cpu_hppa_init() in favor of cpu_generic_init(),
to make cpu_generic_init() work all we need is to provide
cc->class_by_name callback that would resolve any cpu_model
to the sole TYPE_HPPA_CPU to match current behaviour.

Signed-off-by: Igor Mammedov <[email protected]>
Acked-by: Richard Henderson <[email protected]>
Message-Id: <1503592308[email protected]>
Signed-off-by: Eduardo Habkost <[email protected]>