PCI: controller: PCI_IXP4XX should depend on ARCH_IXP4XX

[ Upstream commit 9f1168c ]

The Intel IXP4xx PCI controller is only present on Intel IXP4xx
XScale-based network processor SoCs.

Add a dependency on ARCH_IXP4XX, to prevent asking the user about this
driver when configuring a kernel without support for the XScale
processor family.

Link: https://lore.kernel.org/r/6a88e55fe58fc280f4ff1ca83c154e4895b6dcbf.1624972789.git.geert+renesas@glider.be
Fixes: f7821b4 ("PCI: ixp4xx: Add a new driver for IXP4xx")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
[lorenzo.pieralisi@arm.com: commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/pci/controller/Kconfig

@@ -40,6 +40,7 @@ config PCI_FTPCI100
 config PCI_IXP4XX
 	bool "Intel IXP4xx PCI controller"
 	depends on ARM && OF
+	depends on ARCH_IXP4XX || COMPILE_TEST
 	default ARCH_IXP4XX
 	help
 	  Say Y here if you want support for the PCI host controller found