qcacld-3.0: Change dot11p_mode to enumerated type

dot11p_mode is currently represented with a uint8_t type, despite an
appropriate enumerated type being available. Change the field's type to
the more restrictive 'enum dot11p_mode' instead of uint8_t.

Change-Id: I847ce0901297b0a3e4312e8ce4124a886320f174
CRs-Fixed: 2335575
4 files changed