[GISel] Simplifying return from else in function. NFC

Forgot to integrate this little change in previous commit

llvm-svn: 374463
diff --git a/llvm/lib/CodeGen/GlobalISel/Utils.cpp b/llvm/lib/CodeGen/GlobalISel/Utils.cpp
index cdabf27..45618d7 100644
--- a/llvm/lib/CodeGen/GlobalISel/Utils.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/Utils.cpp
@@ -238,9 +238,8 @@
       assert(Val.getBitWidth() == BitWidth &&
              "Value bitwidth doesn't match definition type");
       return Val;
-    } else {
-      return CstVal.getFPImm()->getValueAPF().bitcastToAPInt();
     }
+    return CstVal.getFPImm()->getValueAPF().bitcastToAPInt();
   };
   while ((MI = MRI.getVRegDef(VReg)) && !IsConstantOpcode(MI->getOpcode()) &&
          LookThroughInstrs) {