extcon: Move struct extcon_cable from header file to core

This patch moves the struct extcon_cable because that should
be only handled by extcon core. There are no reason to publish
the internal structure.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index b6408f0..b5fdb5d 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -77,6 +77,26 @@
 	NULL,
 };
 
+/**
+ * struct extcon_cable - An internal data for each cable of extcon device.
+ * @edev:		The extcon device
+ * @cable_index:	Index of this cable in the edev
+ * @attr_g:		Attribute group for the cable
+ * @attr_name:		"name" sysfs entry
+ * @attr_state:		"state" sysfs entry
+ * @attrs:		Array pointing to attr_name and attr_state for attr_g
+ */
+struct extcon_cable {
+	struct extcon_dev *edev;
+	int cable_index;
+
+	struct attribute_group attr_g;
+	struct device_attribute attr_name;
+	struct device_attribute attr_state;
+
+	struct attribute *attrs[3]; /* to be fed to attr_g.attrs */
+};
+
 static struct class *extcon_class;
 #if defined(CONFIG_ANDROID)
 static struct class_compat *switch_class;