While excluding the current operating channel for preCAC, the
entire tree is skipped if the current operating channel is selected
by the algorithm. In case of a tree node with two 40MHz nodes, if the
selected channel is the current operating channel but the other 40MHz
channel is still pCAC required, that channel should be selected.
To achieve this, move the logic, of excluding the current operating
channels, inside the tree traversal algorithm.
CRs-Fixed: 2621410
Change-Id: Ib8ea3dea168d27ea98a0bf2a9ea1eb57872b285f
9d35cca695