mraa.c: Fix another memleak in mraa_find_i2c_bus_pci
mraa.c: Fix another memleak in mraa_find_i2c_bus_pci

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

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