qcacld-3.0: Use field-by-field assignment for FW stats

In wma_unified_link_iface_stats_event_handler, FW stats is cast into
some host data structure via memory copy. It could be dangerous since
there could be some mismatch between host and FW data structures.
Update it with field-by-field assignment.

Change-Id: If90c6062551c8769d948b3267dfa323fba310a78
CRs-Fixed: 2274034
4 files changed