[susy2] in susyggtt.sa Parameters.h, use fptype instead of fptype_sv …

…for mdl_G__exp__2 in FPTYPE=f

'make HRDCOD=0 FPTYPE=f -j' builds now succeed and the tests succeed too.

'make HRDCOD=0 FPTYPE=m -j' builds now also succeed and the tests succeed too.

'CUDA_HOME=none make HRDCOD=1' builds and tests also succeed with FPTYPE=d,f,m

The only pending problem are CUDA HRDCOD=1 builds because of missing constexpr sin/cos/atan (madgraph5#627)

This is probably ready to be backported to CODEGEN and eventually merged

epochX/cudacpp/susy_gg_tt.sa/src/Parameters_MSSM_SLHA2.h

@@ -858,7 +858,7 @@ namespace mg5amcCpu
         // Model parameters dependent on aS
         //const fptype mdl_sqrt__aS = constexpr_sqrt( aS );
         //const fptype G = 2. * mdl_sqrt__aS * constexpr_sqrt( M_PI );
-        const fptype_sv mdl_G__exp__2 = ( ( G ) * ( G ) );
+        const fptype mdl_G__exp__2 = ( ( G ) * ( G ) );
         // Model couplings dependent on aS
         const cxtype GC_6 = -G;
         const cxtype GC_51 = -( cI * G * mdl_I51x11 );