[media] drivers: media: radio: Fix dependencies for RADIO_WL128X

Fix the following build warning:

warning: (RADIO_WL128X) selects TI_ST which has unmet direct dependencies (MISC_DEVICES && NET && GPIOLIB)
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/radio/wl128x/Kconfig

@@ -5,7 +5,7 @@ menu "Texas Instruments WL128x FM driver (ST based)"
 config RADIO_WL128X
 	tristate "Texas Instruments WL128x FM Radio"
 	depends on VIDEO_V4L2 && RFKILL
-	select TI_ST
+	select TI_ST if NET && GPIOLIB
 	help
 	Choose Y here if you have this FM radio chip.