qcacmn: Add new ftype enums to distinguish rx stats information
Introduce new enum in ftype to identify rx stats data pointed by fctx.
It is added so that only a pointer to the feature specific data can be stored
in fctx. ftype will be used to identify what feature in currently being
pointed to by fctx .
Change-Id: Ic4d8e23c27873875a9cac25e9a5c26096b1705f3
CRs-Fixed: 1055391