ASoC: wm8998: Add Kconfig prompt

Add tristate prompt to allow codec selection.

Signed-off-by: André Apitzsch <git@apitzsch.eu>

Author: André Apitzsch

sound/soc/codecs/Kconfig

@@ -2466,7 +2466,7 @@ config SND_SOC_WM8997
 	depends on MFD_WM8997 && MFD_ARIZONA
 
 config SND_SOC_WM8998
-	tristate
+	tristate "Wolfson Microelectronics WM8998 codec driver"
 	depends on MFD_WM8998 && MFD_ARIZONA
 
 config SND_SOC_WM9081