[PATCH 6/8] irqchip/al-fic: make AL_FIC depend on HAS_IOMEM

[Baoquan He]

On s390 systems (aka mainframes), it has classic channel devices for
networking and permanent storage that are currently even more common
than PCI devices. Hence it could have a fully functional s390 kernel
with CONFIG_PCI=n, then the relevant iomem mapping functions
[including ioremap(), devm_ioremap(), etc.] are not available.

Here let AL_FIC depend on HAS_IOMEM so that it won't be built
to cause below compiling error if PCI is unset:

------
ld: drivers/irqchip/irq-al-fic.o: in function `al_fic_init_dt':
irq-al-fic.c:(.init.text+0x76): undefined reference to `of_iomap'
ld: irq-al-fic.c:(.init.text+0x4ce): undefined reference to `iounmap'
------

Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202306211329.ticOJCSv-lkp@xxxxxxxxx/
Signed-off-by: Baoquan He <bhe@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
---
 drivers/irqchip/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 09e422da482f..4b9036c6d45b 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -89,6 +89,7 @@ config ALPINE_MSI
 config AL_FIC
 	bool "Amazon's Annapurna Labs Fabric Interrupt Controller"
 	depends on OF
+	depends on HAS_IOMEM
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 	help
-- 
2.34.1