qcacld-3.0: Allocate hif_napi_info structures dynamically
The hif_napi_info structure has a dummy netdev included.
The dummy netdev is large. Avoiding unneeded allocation
save 30kb of memory. Dynamically allocating the
hif_napi_info structures also reduces the size of
the contiguous memory needed for the parent structure.
Change-Id: Ib2d0772cf793e25a10329169ddd8ef1dc1022e82
CRs-Fixed: 2020752