PPC: [turbofan] Add RoundUint32ToFloat32 operator to Turbofan.

src/compiler/ppc/instruction-codes-ppc.h

Index: src/compiler/ppc/instruction-codes-ppc.h
diff --git a/src/compiler/ppc/instruction-codes-ppc.h b/src/compiler/ppc/instruction-codes-ppc.h
index 644dbbcd28989b7b9afc4482fbb0a7b42c39d33d..877ebb5c124a639e46042a7818ef317ad334af84 100644
--- a/src/compiler/ppc/instruction-codes-ppc.h
+++ b/src/compiler/ppc/instruction-codes-ppc.h
@@ -84,6 +84,7 @@ namespace compiler {
   V(PPC_Uint64ToDouble)            \
   V(PPC_Int32ToFloat32)            \
   V(PPC_Int32ToDouble)             \
+  V(PPC_Uint32ToFloat32)           \
   V(PPC_Uint32ToDouble)            \
   V(PPC_Float32ToDouble)           \
   V(PPC_DoubleToInt32)             \
@@ -115,7 +116,6 @@ namespace compiler {
   V(PPC_StoreFloat32)              \
   V(PPC_StoreDouble)
 
-
 // Addressing modes represent the "shape" of inputs to an instruction.
 // Many instructions support multiple addressing modes. Addressing modes
 // are encoded into the InstructionCode of the instruction and tell the