[PATCH] ASoC: loongson: Fix build warning when !CONFIG_PCI

[Binbin Zhou <zhoubinbin@xxxxxxxxxxx>]

Fixes the below if kernel config disable PCI support:

sound/soc/loongson/loongson_i2s_pci.c:157:1: warning: data definition has no type or storage class
     157 | module_pci_driver(loongson_i2s_driver);
         | ^~~~~~~~~~~~~~~~~
sound/soc/loongson/loongson_i2s_pci.c:157:1: error: type defaults to 'int' in declaration of 'module_pci_driver' [-Wimplicit-int]
sound/soc/loongson/loongson_i2s_pci.c:157:1: error: parameter names (without types) in function declaration [-Wdeclaration-missing-parameter-type]
sound/soc/loongson/loongson_i2s_pci.c:149:26: warning: 'loongson_i2s_driver' defined but not used [-Wunused-variable]
     149 | static struct pci_driver loongson_i2s_driver = {
         |                          ^~~~~~~~~~~~~~~~~~~

Add the appropriate Kconfig dependency.

Fixes: ba4c5fad598c ("ASoC: loongson: Add I2S controller driver as platform device")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202410101647.o1lI37ou-lkp@xxxxxxxxx/
Closes: https://lore.kernel.org/oe-kbuild-all/202410101439.Tfn5aT6i-lkp@xxxxxxxxx/
Signed-off-by: Binbin Zhou <zhoubinbin@xxxxxxxxxxx>
---
 sound/soc/loongson/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/loongson/Kconfig b/sound/soc/loongson/Kconfig
index e641ae4156d9..2d8291c1443c 100644
--- a/sound/soc/loongson/Kconfig
+++ b/sound/soc/loongson/Kconfig
@@ -16,6 +16,7 @@ config SND_SOC_LOONGSON_CARD
 config SND_SOC_LOONGSON_I2S_PCI
 	tristate "Loongson I2S-PCI Device Driver"
 	depends on LOONGARCH || COMPILE_TEST
+	depends on PCI
 	select REGMAP_MMIO
 	help
 	  Say Y or M if you want to add support for I2S driver for

base-commit: d5ca96a9c21a5bed12bb8d63f1376fdf77026d23
-- 
2.43.5