memleak: Free alloc'ed memory for device
memleak: Free alloc'ed memory for device

Added free for device context.

Signed-off-by: Noel Eck <1e36ab6ededef40f3f16bdbc1b09eee72c5d08cf@intel.com>

g-vidal/upm,jontrulson/upm,sasmita/upm,g-vidal/upm,intel-iot-devkit/upm,jontrulson/upm,Propanu/upm,malikabhi05/upm,spitfire88/upm,pylbert/upm,skiselev/upm,jontrulson/upm,nitirohilla/upm,intel-iot-devkit/upm,intel-iot-devkit/upm,pylbert/upm,sasmita/upm,skiselev/upm,stefan-andritoiu/upm,jontrulson/upm,stefan-andritoiu/upm,skiselev/upm,nitirohilla/upm,malikabhi05/upm,skiselev/upm,skiselev/upm,intel-iot-devkit/upm,Propanu/upm,nitirohilla/upm,stefan-andritoiu/upm,malikabhi05/upm,sasmita/upm,Jon-ICS/upm,pylbert/upm,spitfire88/upm,Jon-ICS/upm,g-vidal/upm,g-vidal/upm,intel-iot-devkit/upm,sasmita/upm,stefan-andritoiu/upm,nitirohilla/upm,nitirohilla/upm,Propanu/upm,spitfire88/upm,spitfire88/upm,spitfire88/upm,Propanu/upm,jontrulson/upm,malikabhi05/upm,pylbert/upm,g-vidal/upm,Jon-ICS/upm,pylbert/upm,malikabhi05/upm,intel-iot-devkit/upm,Propanu/upm,skiselev/upm,Propanu/upm,stefan-andritoiu/upm,pylbert/upm,sasmita/upm,stefan-andritoiu/upm,Jon-ICS/upm,Jon-ICS/upm,g-vidal/upm,malikabhi05/upm