llvm-scan-build: fix value stored to end during init never read in phb3.c
llvm-scan-build: fix value stored to end during init never read in phb3.c

hw/phb3.c:1067:11: warning: Value stored to 'end' during its initialization is never read
        uint64_t end = pci_start_addr + pci_mem_size;
                 ^~~   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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

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