Fix usecount issue for of_fwnode_graph_get_port_parent()

Using CONFIG_OF_DYNAMIC=y uncovered an imbalance in the usecount of the
node being passed to of_fwnode_graph_get_port_parent(). Preserve the
usecount by using of_get_parent() instead of of_get_next_parent() which
don't decrement the usecount of the node passed to it.

Change-Id: Idab6b15bcfa7249544ad93a3efd843d6896e1de0
Reviewed-on: https://tp-biosrd-v02/gerrit/82403
Reviewed-by: Jamess Huang(黃以民) <Jamess_Huang@asus.com>
Tested-by: Jamess Huang(黃以民) <Jamess_Huang@asus.com>

Author: topdjgod

arch/arm/boot/dts/rk3288-miniarm.dts

@@ -531,7 +531,7 @@
 		compatible = "ovti,ov5647";
 		reg = <0x36>;
 		clocks = <&ext_cam_clk>;
-		status = "okay";
+		status = "disabled";
 	};
 
 	camera1: imx219@10 {

arch/arm/configs/miniarm-rk3288_defconfig

@@ -368,12 +368,15 @@ CONFIG_OF=y
 CONFIG_OF_UNITTEST=y
 CONFIG_OF_FLATTREE=y
 CONFIG_OF_EARLY_FLATTREE=y
+CONFIG_OF_DYNAMIC=y
 CONFIG_OF_ADDRESS=y
 CONFIG_OF_IRQ=y
 CONFIG_OF_NET=y
 CONFIG_OF_MDIO=y
 CONFIG_OF_RESERVED_MEM=y
 CONFIG_OF_RESOLVE=y
+CONFIG_OF_OVERLAY=y
+CONFIG_OF_CONFIGFS=y
 CONFIG_SCSI=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_BLK_DEV_SR=y

drivers/of/property.c

@@ -900,7 +900,7 @@ of_fwnode_graph_get_port_parent(struct fwnode_handle *fwnode)
 	struct device_node *np;
 
 	/* Get the parent of the port */
-	np = of_get_next_parent(to_of_node(fwnode));
+	np = of_get_parent(to_of_node(fwnode));
 	if (!np)
 		return NULL;