[media] dvb_usb_v2: make remote controller optional

Make it possible to compile dvb_usb_v2 driver without the remote
controller (RC-core).
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/dvb-usb-v2/Kconfig

 config DVB_USB_V2
 	tristate "Support for various USB DVB devices v2"
-	depends on DVB_CORE && USB && I2C && RC_CORE
+	depends on DVB_CORE && USB && I2C
 	help
 	  By enabling this you will be able to choose the various supported
 	  USB1.1 and USB2.0 DVB devices.
@@ -113,6 +113,7 @@ config DVB_USB_IT913X
 config DVB_USB_LME2510
 	tristate "LME DM04/QQBOX DVB-S USB2.0 support"
 	depends on DVB_USB_V2
+	depends on RC_CORE
 	select DVB_TDA10086 if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_TDA826X if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_STV0288 if MEDIA_SUBDRV_AUTOSELECT

drivers/media/usb/dvb-usb-v2/dvb_usb.h

@@ -400,4 +400,13 @@ extern int dvb_usbv2_reset_resume(struct usb_interface *);
 extern int dvb_usbv2_generic_rw(struct dvb_usb_device *, u8 *, u16, u8 *, u16);
 extern int dvb_usbv2_generic_write(struct dvb_usb_device *, u8 *, u16);
 
+/* stub implementations that will be never called when RC-core is disabled */
+#if !defined(CONFIG_RC_CORE) && !defined(CONFIG_RC_CORE_MODULE)
+#define rc_repeat(args...)
+#define rc_keydown(args...)
+#define rc_keydown_notimeout(args...)
+#define rc_keyup(args...)
+#define rc_g_keycode_from_table(args...) 0
+#endif
+
 #endif

drivers/media/usb/dvb-usb-v2/dvb_usb_core.c

@@ -102,6 +102,7 @@ static int dvb_usbv2_i2c_exit(struct dvb_usb_device *d)
 	return 0;
 }
 
+#if defined(CONFIG_RC_CORE) || defined(CONFIG_RC_CORE_MODULE)
 static void dvb_usb_read_remote_control(struct work_struct *work)
 {
 	struct dvb_usb_device *d = container_of(work,
@@ -202,6 +203,17 @@ static int dvb_usbv2_remote_exit(struct dvb_usb_device *d)
 
 	return 0;
 }
+#else
+static int dvb_usbv2_remote_init(struct dvb_usb_device *d)
+{
+	return 0;
+}
+
+static int dvb_usbv2_remote_exit(struct dvb_usb_device *d)
+{
+	return 0;
+}
+#endif
 
 static void dvb_usb_data_complete(struct usb_data_stream *stream, u8 *buf,
 		size_t len)