[media] tda8290: change magic LNA config values to enum

Use enum instead of magic values for LNA config in tda8290.
Update tda827x, tda18271 and saa7134 to use the enum too.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/tuners/tda8290.h b/drivers/media/tuners/tda8290.h
index 97f1d0f..cf96e58 100644
--- a/drivers/media/tuners/tda8290.h
+++ b/drivers/media/tuners/tda8290.h
@@ -21,8 +21,15 @@
 #include "dvb_frontend.h"
 #include "tda18271.h"
 
+enum tda8290_lna {
+	TDA8290_LNA_OFF = 0,
+	TDA8290_LNA_GP0_HIGH_ON = 1,
+	TDA8290_LNA_GP0_HIGH_OFF = 2,
+	TDA8290_LNA_ON_BRIDGE = 3,
+};
+
 struct tda829x_config {
-	unsigned int lna_cfg;
+	enum tda8290_lna lna_cfg;
 
 	unsigned int probe_tuner:1;
 #define TDA829X_PROBE_TUNER 0