x86: kconfig: Imply CMD_PCI

Let's imply the 'pci' command to access the de facto interconnect
bus in an x86 system.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/Kconfig b/arch/Kconfig
index 78532f5..3fc3c57 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -112,6 +112,7 @@
 	imply CMD_GETTIME
 	imply CMD_IO
 	imply CMD_IRQ
+	imply CMD_PCI
 	imply CMD_SF_TEST
 	imply CMD_ZBOOT