qcacmn: Rename TX_DECAP_TYPE to TX_ENCAP_TYPE

The macros attributing the Tx encap type have been erroneously
named as TX decap.

Rename all occurences of TX_DECAP_* to TX_ENCAP_*. Also add support
to send WMI vdev params for tx_encap and rx_decap values.

CRs-Fixed: 2533710
Change-Id: Id6ef2955868010b264e76d2a416d22d30d2acedc
4 files changed