V4L/DVB (13048): dib0070: fix build dependency when driver is disabled

Fix build dependency on function, dib0070_ctrl_agc_filter

[mchehab@redhat.com: reverted the quick workaround 3f48258e50ef4]

Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/dib0070.h b/drivers/media/dvb/frontends/dib0070.h
index 8a2e1e7..eec9e52 100644
--- a/drivers/media/dvb/frontends/dib0070.h
+++ b/drivers/media/dvb/frontends/dib0070.h
@@ -51,6 +51,7 @@
 #if defined(CONFIG_DVB_TUNER_DIB0070) || (defined(CONFIG_DVB_TUNER_DIB0070_MODULE) && defined(MODULE))
 extern struct dvb_frontend *dib0070_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct dib0070_config *cfg);
 extern u16 dib0070_wbd_offset(struct dvb_frontend *);
+extern void dib0070_ctrl_agc_filter(struct dvb_frontend *, u8 open);
 #else
 static inline struct dvb_frontend *dib0070_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct dib0070_config *cfg)
 {
@@ -63,7 +64,11 @@
 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
 	return -ENODEV;
 }
+
+static inline void dib0070_ctrl_agc_filter(struct dvb_frontend *fe, u8 open)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+}
 #endif
-extern void dib0070_ctrl_agc_filter(struct dvb_frontend *, u8 open);
 
 #endif