qcacmn: Remove multiple definitions of __qdf_nbuf_free api

There are multiple definitions of __qdf_nbuf_free api based
on CONFIG_MCL feature flag.
As a part of cleanup activity remove multiple definitions
of __qdf_nbuf_free api.

Change-Id: Ib7fce54353561a45a4662c05d56d3af187a269e1
CRs-Fixed: 2472016
1 file changed