V4L/DVB (4387): Add Kconfig infrastructure for dvb_attach

Allow it to be en/disabled
Disable it in < 2.6.17 due to symbol_xxx() bug

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Acked-by: Michael Krufky <mkrufky@linuxtv.org>
Acked-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/dvb/frontends/or51211.h b/drivers/media/dvb/frontends/or51211.h
index 13a5a3a..10a5419 100644
--- a/drivers/media/dvb/frontends/or51211.h
+++ b/drivers/media/dvb/frontends/or51211.h
@@ -37,8 +37,17 @@
 	void (*sleep)(struct dvb_frontend * fe);
 };
 
+#if defined(CONFIG_DVB_OR51211) || defined(CONFIG_DVB_OR51211_MODULE)
 extern struct dvb_frontend* or51211_attach(const struct or51211_config* config,
 					   struct i2c_adapter* i2c);
+#else
+static inline struct dvb_frontend* or51211_attach(const struct or51211_config* config,
+					   struct i2c_adapter* i2c)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __FUNCTION__);
+	return NULL;
+}
+#endif // CONFIG_DVB_OR51211
 
 #endif // OR51211_H