Fix bug of some quantize ops because of lack of float16 registration (#65721)

* fix_quant_op_grad_dtype_bug

* fix dtype error

Author: sneaxiy

paddle/phi/kernels/fake_quantize_grad_kernel.cc

@@ -97,10 +97,12 @@ PD_REGISTER_KERNEL(fake_quantize_dequantize_abs_max_grad,
                    GPU,
                    ALL_LAYOUT,
                    phi::FakeQuantizeDequantizeAbsMaxGradKernel,
-                   float) {}
+                   float,
+                   phi::dtype::float16) {}
 PD_REGISTER_KERNEL(fake_quantize_dequantize_moving_average_abs_max_grad,
                    GPU,
                    ALL_LAYOUT,
                    phi::FakeQuantizeDequantizeMovingAverageAbsMaxGradKernel,
-                   float) {}
+                   float,
+                   phi::dtype::float16) {}
 #endif