[media] drxk: Move I2C address into a config structure

Currently, the only parameter to be configured is the I2C
address. However, Terratec H5 logs shows that it needs a different
setting for some things, and it has its own firmware.

So, move the addr into a config structure, in order to allow adding
the required configuration bits.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/drxk.h b/drivers/media/dvb/frontends/drxk.h
index d1c133e..a7b295f 100644
--- a/drivers/media/dvb/frontends/drxk.h
+++ b/drivers/media/dvb/frontends/drxk.h
@@ -4,7 +4,11 @@
 #include <linux/types.h>
 #include <linux/i2c.h>
 
-extern struct dvb_frontend *drxk_attach(struct i2c_adapter *i2c,
-					u8 adr,
+struct drxk_config {
+	u8 adr;
+};
+
+extern struct dvb_frontend *drxk_attach(const struct drxk_config *config,
+					struct i2c_adapter *i2c,
 					struct dvb_frontend **fe_t);
 #endif