mraa.c: fix memleak in find_i2c_bus_pci
mraa.c: fix memleak in find_i2c_bus_pci

Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

spitfire88/mraa,spitfire88/mraa,Propanu/mraa,yongli3/mraa,spitfire88/mraa,Propanu/mraa,stefan-andritoiu/mraa,alext-mkrs/mraa,malikabhi05/mraa,intel-iot-devkit/mraa,ncrastanaren/mraa,alext-mkrs/mraa,jontrulson/mraa,malikabhi05/mraa,ncrastanaren/mraa,stefan-andritoiu/mraa-gpio-chardev,w4ilun/mraa,ProfFan/mraa,intel-iot-devkit/mraa,Propanu/mraa,intel-iot-devkit/mraa,arfoll/mraa,yongli3/mraa,Propanu/mraa,sergev/mraa,stefan-andritoiu/mraa-gpio-chardev,ncrastanaren/mraa,yongli3/mraa,arfoll/mraa,g-vidal/mraa,sergev/mraa,KurtE/mraa,Jon-ICS/mraa,stefan-andritoiu/mraa,g-vidal/mraa,spitfire88/mraa,stefan-andritoiu/mraa-gpio-chardev,stefan-andritoiu/mraa-gpio-chardev,g-vidal/mraa,Jon-ICS/mraa,g-vidal/mraa,ProfFan/mraa,malikabhi05/mraa,KurtE/mraa,stefan-andritoiu/mraa,jontrulson/mraa,whbruce/mraa,w4ilun/mraa,ProfFan/mraa,stefan-andritoiu/mraa,whbruce/mraa,ncrastanaren/mraa,whbruce/mraa,arunlee77/mraa,KurtE/mraa,w4ilun/mraa,alext-mkrs/mraa,arfoll/mraa,jontrulson/mraa,arunlee77/mraa,Jon-ICS/mraa,malikabhi05/mraa,ProfFan/mraa,jontrulson/mraa,sergev/mraa,arunlee77/mraa,alext-mkrs/mraa,sergev/mraa,Propanu/mraa,intel-iot-devkit/mraa,arunlee77/mraa,alext-mkrs/mraa,arfoll/mraa,sergev/mraa,jontrulson/mraa,stefan-andritoiu/mraa-gpio-chardev,whbruce/mraa,w4ilun/mraa,stefan-andritoiu/mraa,arfoll/mraa,g-vidal/mraa,ncrastanaren/mraa,KurtE/mraa,yongli3/mraa,intel-iot-devkit/mraa,KurtE/mraa,malikabhi05/mraa,yongli3/mraa