Revert "[AMDGPU][True16] turn on true16 for all gfx11 devices (llvm#143518)"

breaks build of hipCUB

This reverts commit 0c804da.

Author: ronlieb

llvm/lib/Target/AMDGPU/AMDGPU.td

@@ -1848,8 +1848,7 @@ def FeatureISAVersion11_Common : FeatureSet<
    FeatureImageInsts,
    FeaturePackedTID,
    FeatureVcmpxPermlaneHazard,
-   FeatureMemoryAtomicFAddF32DenormalSupport,
-   FeatureRealTrue16Insts]>;
+   FeatureMemoryAtomicFAddF32DenormalSupport]>;
 
 // There are few workarounds that need to be
 // added to all targets. This pessimizes codegen
@@ -1869,7 +1868,8 @@ def FeatureISAVersion11_0_Common : FeatureSet<
     [FeatureMSAALoadDstSelBug,
      FeatureVALUTransUseHazard,
      FeatureMADIntraFwdBug,
-     FeaturePrivEnabledTrap2NopBug])>;
+     FeaturePrivEnabledTrap2NopBug,
+     FeatureRealTrue16Insts])>;
 
 def FeatureISAVersion11_0_0 : FeatureSet<
   !listconcat(FeatureISAVersion11_0_Common.Features,