sh: support PCI domains.

Newer SH parts are now commonly shipping with multiple controllers, so
we wire up PCI domain support to deal with them. Shamelessly cloned from
the MIPS implementation.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 352879c..bae5383 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -826,11 +826,15 @@
 config PCI
 	bool "PCI support"
 	depends on SYS_SUPPORTS_PCI
+	select PCI_DOMAINS
 	help
 	  Find out whether you have a PCI motherboard. PCI is the name of a
 	  bus system, i.e. the way the CPU talks to the other stuff inside
 	  your box. If you have PCI, say Y, otherwise N.
 
+config PCI_DOMAINS
+	bool
+
 source "drivers/pci/pcie/Kconfig"
 
 source "drivers/pci/Kconfig"