[PATCH] ASoC: stm32: fix unmet dependency on GPIOLIB for SND_SOC_DMIC

[Julian Braha <julianbraha@gmail.com>]

When SND_SOC_STM32_DFSDM is selected,
and GPIOLIB is not selected,
Kbuild gives the following warning:

WARNING: unmet direct dependencies detected for SND_SOC_DMIC
  Depends on [n]: SOUND [=y] && !UML && SND [=y] && SND_SOC [=y] && GPIOLIB [=n]
  Selected by [y]:
  - SND_SOC_STM32_DFSDM [=y] && SOUND [=y] && !UML && SND [=y] && (ARCH_STM32 || COMPILE_TEST [=y]) && SND_SOC [=y] && STM32_DFSDM_ADC [=y]

This is because SND_SOC_STM32_DFSDM selects
SND_SOC_DMIC without selecting or depending on
GPIOLIB, despite SND_SOC_DMIC depending on GPIOLIB.

This unmet dependency bug was detected by Kismet,
a static analysis tool for Kconfig. Please advise
if this is not the appropriate solution.

Signed-off-by: Julian Braha <julianbraha@gmail.com>
---
 sound/soc/stm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/stm/Kconfig b/sound/soc/stm/Kconfig
index da1f7a16605b..bfc11b606bbd 100644
--- a/sound/soc/stm/Kconfig
+++ b/sound/soc/stm/Kconfig
@@ -37,6 +37,7 @@ config SND_SOC_STM32_DFSDM
 	depends on ARCH_STM32 || COMPILE_TEST
 	depends on SND_SOC
 	depends on STM32_DFSDM_ADC
+	depends on GPIOLIB
 	select SND_SOC_GENERIC_DMAENGINE_PCM
 	select SND_SOC_DMIC
 	select IIO_BUFFER_CB
-- 
2.32.0