qcacld-3.0: Avoid connection count in case of LFR2

In LFR2.0, number of connection count is already decremented
in hdd_sme_roam_callback. No need to again decrement this count
after roaming.

Change-Id: I185b5f7f2f79c1ba29b61797b6e879edb2c6b726
CRs-Fixed: 2519376
1 file changed