Rate index zero (representing 11 Mbps in ratetable) was ignored in current
stats implementation. Added code changes to include zero rate index
Some formatting is done in peerstats app to avoid exceeding 80 chars
CRs-Fixed: 2424176
Change-Id: I9d6938cc840ee3db3639b3608b429a97832c3168
Define cache module code required for RDK-B statistics :
a. Objects to maintain tx and rx rate related statistics
b. Interface objects to be use by dp while pushing stats to module
c. Northbound interaction specific IOCTL structures/enums
d. WDI handlers for southbound interaction from dp to stats module.
CRs-Fixed: 2407888
Change-Id: I50b1461bc415e957d224bb1ec56e5e94cd833c27
