Using the rte_bsf32 function to find last set bit. This avoids
the for loop and hence the bad bit shift operation.
Coverity issue: 323477
Fixes: 351fbee21986 ("common/cpt: support hash")
Signed-off-by: Ankur Dwivedi <ankur.dwivedi@caviumnetworks.com>
Signed-off-by: Anoob Joseph <anoob.joseph@caviumnetworks.com>