pn532: fixed uninitialized variable and URL buffer
pn532: fixed uninitialized variable and URL buffer

Signed-off-by: Mihai Tudor Panu <a27de6130c5d32f5817bf40bb8b348582f37a8af@intel.com>

mircea/upm,andreivasiliu2211/upm,rafaneri/upm,srware/upm,Propanu/upm,jontrulson/upm,afmckinney/upm,jontrulson/upm,andreivasiliu2211/upm,afmckinney/upm,yoyojacky/upm,pylbert/upm,Jon-ICS/upm,g-vidal/upm,mircea/upm,whbruce/upm,malikabhi05/upm,andreivasiliu2211/upm,intel-iot-devkit/upm,kissbac/upm,sasmita/upm,afmckinney/upm,jontrulson/upm,spitfire88/upm,skiselev/upm,pylbert/upm,whbruce/upm,srware/upm,nitirohilla/upm,yoyojacky/upm,malikabhi05/upm,whbruce/upm,tripzero/upm,jontrulson/upm,arfoll/upm,malikabhi05/upm,skiselev/upm,rafaneri/upm,nitirohilla/upm,yoyojacky/upm,srware/upm,arfoll/upm,intel-iot-devkit/upm,pylbert/upm,spitfire88/upm,Jon-ICS/upm,skiselev/upm,spitfire88/upm,tripzero/upm,spitfire88/upm,stefan-andritoiu/upm,stefan-andritoiu/upm,whbruce/upm,yoyojacky/upm,sasmita/upm,skiselev/upm,kissbac/upm,mircea/upm,intel-iot-devkit/upm,Propanu/upm,MakerCollider/upm,spitfire88/upm,MakerCollider/upm,kissbac/upm,jontrulson/upm,Jon-ICS/upm,whbruce/upm,Propanu/upm,arfoll/upm,stefan-andritoiu/upm,g-vidal/upm,g-vidal/upm,MakerCollider/upm,ShawnHymel/upm,skiselev/upm,tripzero/upm,g-vidal/upm,intel-iot-devkit/upm,tripzero/upm,Propanu/upm,sasmita/upm,MakerCollider/upm,nitirohilla/upm,rafaneri/upm,pylbert/upm,rafaneri/upm,ShawnHymel/upm,andreivasiliu2211/upm,nitirohilla/upm,sasmita/upm,intel-iot-devkit/upm,sasmita/upm,srware/upm,ShawnHymel/upm,stefan-andritoiu/upm,g-vidal/upm,arfoll/upm,afmckinney/upm,pylbert/upm,rafaneri/upm,stefan-andritoiu/upm,g-vidal/upm,kissbac/upm,nitirohilla/upm,yoyojacky/upm,Propanu/upm,tripzero/upm,Jon-ICS/upm,andreivasiliu2211/upm,pylbert/upm,mircea/upm,ShawnHymel/upm,arfoll/upm,MakerCollider/upm,Jon-ICS/upm,srware/upm,intel-iot-devkit/upm,mircea/upm,skiselev/upm,malikabhi05/upm,stefan-andritoiu/upm,malikabhi05/upm,kissbac/upm,afmckinney/upm,ShawnHymel/upm,Propanu/upm,malikabhi05/upm