gpio.h: Fixed a typo.
gpio.h: Fixed a typo.

jamorham/wixel-xDrip,markncooper/burnerlight,markncooper/burnerlight,pdg137/wixel-sdk,pdg137/wixel-sdk,raduiliescu/wixel-DexDrip,Cagier/wixel-xDrip,saercnap/wixel-DexDrip,saercnap/wixel-DexDrip,raduiliescu/wixel-DexDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,Cagier/wixel-xDrip,sm6xmm/wixel-xDrip,jamorham/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,sm6xmm/wixel-xDrip,saercnap/wixel-DexDrip,Cagier/wixel-xDrip,jamorham/wixel-xDrip,sm6xmm/wixel-xDrip,novagannas/wixel-xDrip,raduiliescu/wixel-DexDrip,novagannas/wixel-xDrip,sm6xmm/wixel-xDrip,novagannas/wixel-xDrip,StephenBlackWasAlreadyTaken/wixel-xDrip,pdg137/wixel-sdk,markncooper/burnerlight,jamorham/wixel-xDrip