qcacmn: Fix FTM rx frames capture in packet capture mode

Currently the FTM rx frames are dropped in
tgt_mgmt_txrx_rx_frame_handler considering them as unspecified
packets as action category for FTM is not defined.

Define FTM action category so that the FTM frames will not be
considered as unspecified frames and dropped while processing.

Change-Id: Ieb3980978e38b3f826f42380e29798767c8f1fe2
CRs-Fixed: 3254409