Fix Balance hardcoded case #248
Description
In src/libpsc/psc_balance/psc_balance_imp.hxx the cuda case defined by USE_CUDA hardcodes the case geometry to BS444. This restricts use to the 3D geometry
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In src/libpsc/psc_balance/psc_balance_imp.hxx the cuda case defined by USE_CUDA hardcodes the case geometry to BS444. This restricts use to the 3D geometry