code clean up in caedrserver.c

code clean up in caedrserver.c

In CAEDRNativeReadData(), getting a address string of the device is unnecessary
unless inputstream is available.

Change-Id: Ic1d363bc42eaeb948fe8f6ee5f4fddcec3d35086
Signed-off-by: Jaewook Jung <jw0213.jung@samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/5721
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: jihwan seo <jihwan.seo@samsung.com>
Reviewed-by: Jon A. Cruz <jon@joncruz.org>
(cherry picked from commit 77f5a745361dfd79addd79899e0cb5863330e34b)
Reviewed-on: https://gerrit.iotivity.org/gerrit/5929