PCI: consolidate PCI config entry in drivers/pci

There is no good reason to duplicate the PCI menu in every architecture.
Instead provide a selectable HAVE_PCI symbol that indicates availability
of PCI support, and a FORCE_PCI symbol to for PCI on and the handle the
rest in drivers/pci.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index effed2e..cee1fc84 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -30,6 +30,7 @@
 	select HAVE_FUNCTION_TRACER
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_OPROFILE
+	select HAVE_PCI
 	select IRQ_DOMAIN
 	select XILINX_INTC
 	select MODULES_USE_ELF_RELA
@@ -266,9 +267,6 @@
 
 menu "Bus Options"
 
-config PCI
-	bool "PCI support"
-
 config PCI_DOMAINS
 	def_bool PCI
 
@@ -282,6 +280,4 @@
 	bool "Xilinx PCI host bridge support"
 	depends on PCI
 
-source "drivers/pci/Kconfig"
-
 endmenu