ASoC: make wm8782 codec selectable in Kconfig

FOr platforms that use the simple-card driver, the codec cannot be selected
through 'select' magic in Kconfig. So turn this into a real config option.
Signed-off-by: NDaniel Mack <daniel@zonque.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -1131,7 +1131,7 @@ config SND_SOC_WM8776
 	depends on SND_SOC_I2C_AND_SPI
 
 config SND_SOC_WM8782
-	tristate
+	tristate "Wolfson Microelectronics WM8782 ADC"
 
 config SND_SOC_WM8804
 	tristate