mraa_internal_types.h: changed unsigned ints in board_t to ints and removed const modifiers
mraa_internal_types.h: changed unsigned ints in board_t to ints and removed const modifiers

Signed-off-by: Houman Brinjcargorabi <18e16ba29d6bded5f24b6c03fa1333260d000956@intel.com>
Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

KurtE/mraa,whbruce/mraa,Jon-ICS/mraa,jontrulson/mraa,sergev/mraa,Hbrinj/mraa,yongli3/mraa,Propanu/mraa,Jon-ICS/mraa,spitfire88/mraa,Hbrinj/mraa,yongli3/mraa,petreeftime/mraa,ProfFan/mraa,stefan-andritoiu/mraa,ncrastanaren/mraa,stefan-andritoiu/mraa,KurtE/mraa,arunlee77/mraa,KurtE/mraa,malikabhi05/mraa,stefan-andritoiu/mraa,arfoll/mraa,arfoll/mraa,petreeftime/mraa,stefan-andritoiu/mraa-gpio-chardev,andreivasiliu2211/mraa,arunlee77/mraa,Propanu/mraa,ncrastanaren/mraa,yongli3/mraa,whbruce/mraa,g-vidal/mraa,stefan-andritoiu/mraa-gpio-chardev,stefan-andritoiu/mraa-gpio-chardev,malikabhi05/mraa,Propanu/mraa,arfoll/mraa,g-vidal/mraa,arfoll/mraa,Hbrinj/mraa,alext-mkrs/mraa,yongli3/mraa,stefan-andritoiu/mraa,ProfFan/mraa,Hbrinj/mraa,malikabhi05/mraa,Jon-ICS/mraa,yongli3/mraa,w4ilun/mraa,g-vidal/mraa,ProfFan/mraa,andreivasiliu2211/mraa,g-vidal/mraa,malikabhi05/mraa,arunlee77/mraa,jontrulson/mraa,w4ilun/mraa,intel-iot-devkit/mraa,alext-mkrs/mraa,alext-mkrs/mraa,sergev/mraa,KurtE/mraa,sergev/mraa,Propanu/mraa,intel-iot-devkit/mraa,g-vidal/mraa,stefan-andritoiu/mraa-gpio-chardev,andreivasiliu2211/mraa,andreivasiliu2211/mraa,spitfire88/mraa,ncrastanaren/mraa,jontrulson/mraa,spitfire88/mraa,intel-iot-devkit/mraa,whbruce/mraa,arfoll/mraa,alext-mkrs/mraa,intel-iot-devkit/mraa,spitfire88/mraa,sergev/mraa,malikabhi05/mraa,jontrulson/mraa,stefan-andritoiu/mraa,petreeftime/mraa,ncrastanaren/mraa,KurtE/mraa,w4ilun/mraa,arunlee77/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,sergev/mraa,ncrastanaren/mraa,petreeftime/mraa,jontrulson/mraa,ProfFan/mraa,w4ilun/mraa,alext-mkrs/mraa,whbruce/mraa,Propanu/mraa