Addressed endpoint pointer type mismatches in LE adapter.

Addressed endpoint pointer type mismatches in LE adapter.

Corrected a pointer type mismatch in the BLE adapter implementation
introduced by commit 6c0321f5 where the endpoint parameter of the
network packet received callback was changed from CAEndpoint_t* to
CASecureEndpoint_t*.

Change-Id: Id7413f2085fe7e230be811723ff0392bb11efd33
Signed-off-by: Ossama Othman <ossama.othman@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/2488
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Patrick Lankswert <patrick.lankswert@intel.com>