Fix build without gpiu-sd
Fix build without gpiu-sd

[ ] May break build
[ ] May break existing applications (see CHANGES.txt)
[x] Bugfix
[ ] New Feature
[ ] Cleanup
[ ] Optimization
[ ] Documentation

shuaibarshad/KAUST-CMake,jafyvilla/CMake,biddisco/CMake,rballester/vmmlib,BlueBrain/Tuvok,hernando/vmmlib,shurikasa/CMake,hernando/vmmlib,ptoharia/CMake,shurikasa/CMake,biddisco/CMake,shuaibarshad/KAUST-CMake,rballester/vmmlib,hernando/vmmlib,tribal-tec/vmmlib,biddisco/CMake,rballester/vmmlib,biddisco/CMake,BlueBrain/Tuvok,jafyvilla/CMake,ptoharia/CMake,jafyvilla/CMake,shuaibarshad/KAUST-CMake,shurikasa/CMake,ptoharia/CMake,jafyvilla/CMake,shuaibarshad/KAUST-CMake,BlueBrain/Tuvok,shurikasa/CMake,ptoharia/CMake