PCI: consolidate the PCI_SYSCALL symbol

Let architectures select the syscall support instead of duplicating the
kconfig entry.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index 2bf98e5..1f67950 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -8,6 +8,7 @@
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select FORCE_PCI if !ALPHA_JENSEN
 	select PCI_DOMAINS if PCI
+	select PCI_SYSCALL if PCI
 	select HAVE_AOUT
 	select HAVE_IDE
 	select HAVE_OPROFILE
@@ -322,9 +323,6 @@
 	bool
 	default y
 
-config PCI_SYSCALL
-	def_bool PCI
-
 config ALPHA_NONAME
 	bool
 	depends on ALPHA_BOOK1 || ALPHA_NONAME_CH