security: Apply code style to json2cbor.c code

security: Apply code style to json2cbor.c code

There is not functionnal change,
It was done to make upcoming changes easier to review.

Bug: https://jira.iotivity.org/browse/IOT-2310
Change-Id: I6f8cd3ed7cd0a6e3c9d9879996964de8e8aa3a99
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/20879
Reviewed-by: George Nash <george.nash@intel.com>
Reviewed-by: C.J. Collier <cjcollier@linuxfoundation.org>
(cherry picked from commit 837d2ee9b23e24ca47651cbaa5ceb6b6d6beebf6)
Reviewed-on: https://gerrit.iotivity.org/gerrit/20883
Tested-by: jenkins-iotivity <jenkins@iotivity.org>
Reviewed-by: Dan Mihai <Daniel.Mihai@microsoft.com>