USB: Added USB_ETH_RNDIS to use instead of CONFIG_USB_ETH_RNDIS

If g_ether and g_multi are both built CONFIG_USB_ETH_RNDIS symbol
may be redefined in the later and, whats even worse, g_ether's settings
may affect g_multi's.  This adds a USB_ETH_RNDIS symbol defined at the
beginning of ether.c and multi.c according toproper KConfig settings.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 167cb2a..141372b 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -25,6 +25,14 @@
 #include <linux/kernel.h>
 #include <linux/utsname.h>
 
+
+#if defined USB_ETH_RNDIS
+#  undef USB_ETH_RNDIS
+#endif
+#ifdef CONFIG_USB_ETH_RNDIS
+#  define USB_ETH_RNDIS y
+#endif
+
 #include "u_ether.h"
 
 
@@ -66,7 +74,7 @@
 #define DRIVER_DESC		"Ethernet Gadget"
 #define DRIVER_VERSION		"Memorial Day 2008"
 
-#ifdef CONFIG_USB_ETH_RNDIS
+#ifdef USB_ETH_RNDIS
 #define PREFIX			"RNDIS/"
 #else
 #define PREFIX			""
@@ -87,7 +95,7 @@
 
 static inline bool has_rndis(void)
 {
-#ifdef	CONFIG_USB_ETH_RNDIS
+#ifdef	USB_ETH_RNDIS
 	return true;
 #else
 	return false;
@@ -110,7 +118,7 @@
 
 #include "f_ecm.c"
 #include "f_subset.c"
-#ifdef	CONFIG_USB_ETH_RNDIS
+#ifdef	USB_ETH_RNDIS
 #include "f_rndis.c"
 #include "rndis.c"
 #endif
@@ -251,7 +259,7 @@
 
 /*-------------------------------------------------------------------------*/
 
-#ifdef CONFIG_USB_ETH_EEM
+#ifdef USB_ETH_EEM
 static int use_eem = 1;
 #else
 static int use_eem;