irq-msi-lib directly uses struct msi_domain_info and
MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS (and likely more) which are only available
when CONFIG_GENERIC_MSI_IRQ=y.

However, no dependency is specified. If it happens that
CONFIG_IRQ_MSI_LIB=y while CONFIG_GENERIC_MSI_IRQ=n, the kernel fails to
build.

Specify this dependency and fix the build.

Fixes: 72e257c6f058 ("irqchip: Provide irq-msi-lib")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202506282256.cHlEHrdc-lkp@intel.com/
Signed-off-by: Nam Cao <namcao@linutronix.de>
---
 drivers/irqchip/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 0d196e4471426..c3928ef793449 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -74,6 +74,7 @@ config ARM_VIC_NR
 
 config IRQ_MSI_LIB
 	bool
+	select GENERIC_MSI_IRQ
 
 config ARMADA_370_XP_IRQ
 	bool
-- 
2.39.5