ARM: cns3xxx: drop unnecessary symbol selection

ARCH_CNS3XXX already selects MIGHT_HAVE_PCI, so boards don't have to

Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/mach-cns3xxx/Kconfig b/arch/arm/mach-cns3xxx/Kconfig
index 29b13f2..9ebfcc4 100644
--- a/arch/arm/mach-cns3xxx/Kconfig
+++ b/arch/arm/mach-cns3xxx/Kconfig
@@ -3,7 +3,6 @@
 
 config MACH_CNS3420VB
 	bool "Support for CNS3420 Validation Board"
-	select MIGHT_HAVE_PCI
 	help
 	  Include support for the Cavium Networks CNS3420 MPCore Platform
 	  Baseboard.