usb: gadget: u_ether: convert into module

u_ether.c has been #include'd by all gadgets which implement
USB Ethernet functions. In order to add configfs support,
the f_ecm.c, f_eem.c, f_ncm.c, f_subset.c, f_rndis.c need to be
converted into modules and must not be #include'd. Consequently,
the u_ether.c needs to be a module too, in a manner similar
to u_serial.c. The resulting module should not take any parameters,
so they are pushed to the current users of it, that is ether.c,
g_ffs.c, multi.c, ncm.c, nokia.c.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/gadget/cdc2.c b/drivers/usb/gadget/cdc2.c
index 2c52551..bffa997 100644
--- a/drivers/usb/gadget/cdc2.c
+++ b/drivers/usb/gadget/cdc2.c
@@ -35,6 +35,8 @@
 /*-------------------------------------------------------------------------*/
 USB_GADGET_COMPOSITE_OPTIONS();
 
+USB_ETHERNET_MODULE_PARAMETERS();
+
 /*
  * Kbuild is not very cooperative with respect to linking separately
  * compiled library objects into one module.  So for now we won't use
@@ -43,7 +45,6 @@
  * a "gcc --combine ... part1.c part2.c part3.c ... " build would.
  */
 #include "f_ecm.c"
-#include "u_ether.c"
 
 /*-------------------------------------------------------------------------*/
 
@@ -102,7 +103,7 @@
 	NULL,
 };
 
-static u8 hostaddr[ETH_ALEN];
+static u8 host_mac[ETH_ALEN];
 static struct eth_dev *the_dev;
 /*-------------------------------------------------------------------------*/
 static struct usb_function *f_acm;
@@ -120,7 +121,7 @@
 		c->bmAttributes |= USB_CONFIG_ATT_WAKEUP;
 	}
 
-	status = ecm_bind_config(c, hostaddr, the_dev);
+	status = ecm_bind_config(c, host_mac, the_dev);
 	if (status < 0)
 		return status;
 
@@ -166,7 +167,8 @@
 	}
 
 	/* set up network link layer */
-	the_dev = gether_setup(cdev->gadget, hostaddr);
+	the_dev = gether_setup(cdev->gadget, dev_addr, host_addr, host_mac,
+			       qmult);
 	if (IS_ERR(the_dev))
 		return PTR_ERR(the_dev);