Convert CONFIG_PCI_SCAN_SHOW to Kconfig

This converts the following to Kconfig:
   CONFIG_PCI_SCAN_SHOW

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ge_bx50v3_defconfig b/configs/ge_bx50v3_defconfig
index 114a361..c332878 100644
--- a/configs/ge_bx50v3_defconfig
+++ b/configs/ge_bx50v3_defconfig
@@ -74,6 +74,7 @@
 CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_PCI=y
+CONFIG_PCI_SCAN_SHOW=y
 CONFIG_PCIE_IMX=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y