hw/phb3: Remove struct rtt_entry
hw/phb3: Remove struct rtt_entry

Nobody is using it except calculating the RTE table size. The
patch removes it.

Signed-off-by: Gavin Shan <0398910e4f4970259b451f0f9d0686cc5e961b81@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.vnet.ibm.com>

csmart/skiboot,legoater/skiboot,mikey/skiboot,qemu/skiboot,qemu/skiboot,qemu/skiboot,csmart/skiboot,stewart-ibm/skiboot,mikey/skiboot,apopple/skiboot,shenki/skiboot,shenki/skiboot,apopple/skiboot,legoater/skiboot,open-power/skiboot,open-power/skiboot,shenki/skiboot,shenki/skiboot,legoater/skiboot,open-power/skiboot,qemu/skiboot,stewart-ibm/skiboot,open-power/skiboot,mikey/skiboot,legoater/skiboot,qemu/skiboot,csmart/skiboot,legoater/skiboot,stewart-ibm/skiboot,apopple/skiboot,shenki/skiboot,open-power/skiboot