ASoC: wm8994: Add depends on MFD core

The ASoC driver should not be used without the MFD component. This was
causing randconfig issues with regmap IRQ which is selected by the MFD
part of the wm8994 driver.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Charles Keepax <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

Author: charleskeepax

sound/soc/codecs/Kconfig

@@ -2451,6 +2451,7 @@ config SND_SOC_WM8993
 
 config SND_SOC_WM8994
 	tristate
+	depends on MFD_WM8994
 
 config SND_SOC_WM8995
 	tristate