STYLE: Consistently reference *_SUPERBUILD CMake variables
STYLE: Consistently reference *_SUPERBUILD CMake variables

bpaniagua/SPHARM-PDM,NIRALUser/SPHARM-PDM,NIRALUser/SPHARM-PDM,bpaniagua/SPHARM-PDM,NIRALUser/SPHARM-PDM,bpaniagua/SPHARM-PDM