hw/ppc: remove return after g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
assertion mechanisms.

Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20240919044641.386068-30-pierrick.bouvier@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/ppc/ppc.c

@@ -267,7 +267,6 @@ static void power9_set_irq(void *opaque, int pin, int level)
         break;
     default:
         g_assert_not_reached();
-        return;
     }
 }
 

hw/ppc/spapr_events.c

@@ -646,7 +646,6 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
          * that don't support them
          */
         g_assert_not_reached();
-        return;
     }
 
     if (hp_id == RTAS_LOG_V6_HP_ID_DRC_COUNT) {