Enable DP Bus Bandwidth feature in WHUNT config, this helps to
execute and detect issues in Bus Bandwidth feature code path.
Change-Id: Id4376236b77661519667c40c427c50af436a9dc2
CRs-Fixed: 2597300
1. Add whunt_defconfig for whunt target. New Features can be
enabled in it to run related whunt test cases.
2. Enable CONFIG_BAND_6GHZ and CONFIG_WLAN_FEATURE_11AX
for whunt 6GHz test.
Change-Id: I63b84086cbf28e1fe3ab44bedb4977e73212af29
CRs-Fixed: 2550575