qcacmn: qdf: Introduce QDF_MAC_ADDR_FMT and QDF_MAC_ADDR_REF

Introduce the feature to hide 2nd, 3rd and 4th octet of the
MAC address in the logs.

To enable this feature set CONFIG_WLAN_TRACE_HIDE_MAC_ADDRESS to y.
For example, if this feature is enabled, then
mac address ae:45:9c:f1:c0:98 shall be printed as ae:**:**:**:c0:98

If this feature is disabled, then QDF_MAC_ADDR_FMT translates to
"%pM".

Change-Id: I7b3823d33748120b0fa5eb372f7957de59760536
CRs-Fixed: 2751002