Following are the changes:
1. Add macros relevant to the addition of the 320 MHz root to the preCAC
tree.
2. Adding 320MHz bandwidth in switch case and separating
'case CH_WIDTH_320MHZ' using a compile time macro ( 11BE), forces us
to use the macro inside the function, which is not allowed by the
coding guideline.
Convert the "switch case" mapping (which is generally a binary search)
into a linear search of a mapping (BW -> bonded pair) array , thereby
using the macro WLAN_FEATURE_11BE to separate the 320MHz bandwidth
in the data structure space instead of doing the separation inside
the function space.
Change-Id: Iaab2328deef1cb7b2ff82bafe5d3cd2ea137e725