[mlir] Fix case in MLIRGPUtoSPIRVTransforms

This patch changes the casing of MLIRGPUtoSPIRVTransforms
to be consistent with other transforms libraries.

Differential Revision: https://reviews.llvm.org/D81902

mlir/lib/Conversion/GPUToSPIRV/CMakeLists.txt

@@ -2,7 +2,7 @@ set(LLVM_TARGET_DEFINITIONS GPUToSPIRV.td)
 mlir_tablegen(GPUToSPIRV.cpp.inc -gen-rewriters)
 add_public_tablegen_target(MLIRGPUToSPIRVIncGen)
 
-add_mlir_conversion_library(MLIRGPUtoSPIRVTransforms
+add_mlir_conversion_library(MLIRGPUToSPIRVTransforms
   ConvertGPUToSPIRV.cpp
   ConvertGPUToSPIRVPass.cpp