cuda: revert to SM 5.0 only by default

ccminer.vcxproj

@@ -172,7 +172,7 @@
       <MaxRegCount>80</MaxRegCount>
       <PtxAsOptionV>true</PtxAsOptionV>
       <Keep>false</Keep>
-      <CodeGeneration>compute_30,sm_30;compute_35,sm_35;compute_50,sm_50;compute_52,sm_52</CodeGeneration>
+      <CodeGeneration>compute_50,sm_50</CodeGeneration>
       <AdditionalOptions>--ptxas-options="-O2" %(AdditionalOptions)</AdditionalOptions>
       <Defines>
       </Defines>
@@ -473,4 +473,4 @@
   <Target Name="AfterClean">
     <Delete Files="@(FilesToCopy->'$(OutDir)%(Filename)%(Extension)')" TreatErrorsAsWarnings="true" />
   </Target>
-</Project>
+</Project>