gpio.h: Fixed a couple of typos in description
gpio.h: Fixed a couple of typos in description

Signed-off-by: Alex Tereschenko <c1573d8a2714f7b294fae3af1bb5e489479ca966@gmail.com>
Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

malikabhi05/mraa,andreivasiliu2211/mraa,stefan-andritoiu/mraa-gpio-chardev,Hbrinj/mraa,arfoll/mraa,spitfire88/mraa,Jon-ICS/mraa,neuroidss/mraa,andreivasiliu2211/mraa,Pillar1989/mraa,intel-iot-devkit/mraa,w4ilun/mraa,w4ilun/mraa,malikabhi05/mraa,sergev/mraa,g-vidal/mraa,andreivasiliu2211/mraa,stefan-andritoiu/mraa-gpio-chardev,alext-mkrs/mraa,Hbrinj/mraa,arunlee77/mraa,tripzero/mraa,KurtE/mraa,stefan-andritoiu/mraa,Propanu/mraa,Pillar1989/mraa,sergev/mraa,yongli3/mraa,KurtE/mraa,jontrulson/mraa,g-vidal/mraa,stefan-andritoiu/mraa-gpio-chardev,Propanu/mraa,malikabhi05/mraa,ProfFan/mraa,jontrulson/mraa,yongli3/mraa,arfoll/mraa,anonymouse64/mraa,alext-mkrs/mraa,arunlee77/mraa,g-vidal/mraa,KurtE/mraa,ncrastanaren/mraa,anonymouse64/mraa,spitfire88/mraa,yongli3/mraa,neuroidss/mraa,g-vidal/mraa,spitfire88/mraa,alext-mkrs/mraa,alext-mkrs/mraa,sergev/mraa,ProfFan/mraa,andreivasiliu2211/mraa,jontrulson/mraa,stefan-andritoiu/mraa,arfoll/mraa,stefan-andritoiu/mraa,w4ilun/mraa,sergev/mraa,ProfFan/mraa,nioinnovation/mraa,jontrulson/mraa,whbruce/mraa,petreeftime/mraa,ProfFan/mraa,Jon-ICS/mraa,stefan-andritoiu/mraa,intel-iot-devkit/mraa,petreeftime/mraa,yongli3/mraa,whbruce/mraa,whbruce/mraa,KurtE/mraa,stefan-andritoiu/mraa,w4ilun/mraa,arfoll/mraa,nioinnovation/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,tripzero/mraa,ncrastanaren/mraa,damcclos/mraa,Propanu/mraa,alext-mkrs/mraa,malikabhi05/mraa,petreeftime/mraa,neuroidss/mraa,Hbrinj/mraa,Jon-ICS/mraa,anonymouse64/mraa,petreeftime/mraa,arunlee77/mraa,ncrastanaren/mraa,ncrastanaren/mraa,malikabhi05/mraa,damcclos/mraa,stefan-andritoiu/mraa-gpio-chardev,intel-iot-devkit/mraa,intel-iot-devkit/mraa,Pillar1989/mraa,sergev/mraa,ncrastanaren/mraa,arunlee77/mraa,Propanu/mraa,spitfire88/mraa,Hbrinj/mraa,whbruce/mraa,Propanu/mraa,g-vidal/mraa,yongli3/mraa,nioinnovation/mraa,damcclos/mraa,KurtE/mraa,arfoll/mraa,jontrulson/mraa,tripzero/mraa