hw/ppc: replace assert(false) with 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: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20240919044641.386068-13-pierrick.bouvier@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/ppc/spapr_events.c

@@ -645,7 +645,7 @@ static void spapr_hotplug_req_event(uint8_t hp_id, uint8_t hp_action,
         /* we shouldn't be signaling hotplug events for resources
          * that don't support them
          */
-        g_assert(false);
+        g_assert_not_reached();
         return;
     }