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/arm64/Kconfig b/arch/arm64/Kconfig
index 787d785..feffc52 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -103,6 +103,7 @@
 	select GENERIC_TIME_VSYSCALL
 	select HANDLE_DOMAIN_IRQ
 	select HARDIRQS_SW_RESEND
+	select HAVE_PCI
 	select HAVE_ACPI_APEI if (ACPI && EFI)
 	select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 	select HAVE_ARCH_AUDITSYSCALL
@@ -287,15 +288,6 @@
 
 source "arch/arm64/Kconfig.platforms"
 
-menu "Bus support"
-
-config PCI
-	bool "PCI support"
-	help
-	  This feature enables support for PCI bus system. If you say Y
-	  here, the kernel will include drivers and infrastructure code
-	  to support PCI bus devices.
-
 config PCI_DOMAINS
 	def_bool PCI
 
@@ -305,10 +297,6 @@
 config PCI_SYSCALL
 	def_bool PCI
 
-source "drivers/pci/Kconfig"
-
-endmenu
-
 menu "Kernel Features"
 
 menu "ARM errata workarounds via the alternatives framework"