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/arm64/Kconfig b/arch/arm64/Kconfig
index 0eba261..8db186f 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -166,6 +166,7 @@
 	select OF_RESERVED_MEM
 	select PCI_DOMAINS_GENERIC if PCI
 	select PCI_ECAM if ACPI
+	select PCI_SYSCALL if PCI
 	select POWER_RESET
 	select POWER_SUPPLY
 	select REFCOUNT_FULL
@@ -289,9 +290,6 @@
 
 source "arch/arm64/Kconfig.platforms"
 
-config PCI_SYSCALL
-	def_bool PCI
-
 menu "Kernel Features"
 
 menu "ARM errata workarounds via the alternatives framework"