net: wirelss:bcmdhd revert roaming patch

1) The patch was needed for roaming patch in the FW.
However, we need to revert this code because we revert
the roaming patch in new FW(7.35.79.49)
2) Bug : 18541286
Signed-off-by: Ecco park <eccopark@broadcom.com>

Change-Id: I66123f0911670a66e923353ae112d492a3b3869a
leanKernel v1.2

Change-Id: Ib90bc204581c888b3547ee586a87437360df91f4