MGS-4105 [#imx-1104] fix OPP failure log in gpu kernel

not a problem without operating-points in gpu device entry,
need disable error message for frequency scaling failure.

Signed-off-by: Xianzhong <xianzhong.li@nxp.com>

drivers/mxc/gpu-viv/hal/os/linux/kernel/platform/freescale/gc_hal_kernel_platform_imx.c

@@ -511,8 +511,7 @@ int init_gpu_opp_table(struct device *dev)
 
     prop = of_find_property(dev->of_node, "operating-points", NULL);
     if (!prop) {
-	dev_err(dev, "operating-points missing. Frequency scaling will not work\n");
-        return -ENODEV;
+        return 0;
     }
 
     if (!prop->value) {