Convert CONFIG_LAYERSCAPE_NS_ACCESS to Kconfig

This converts the following to Kconfig:
   CONFIG_LAYERSCAPE_NS_ACCESS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/pg_wcom_seli8_defconfig b/configs/pg_wcom_seli8_defconfig
index 51919dc..ce3e7eb 100644
--- a/configs/pg_wcom_seli8_defconfig
+++ b/configs/pg_wcom_seli8_defconfig
@@ -19,6 +19,7 @@
 CONFIG_ENV_ADDR=0x60060000
 CONFIG_AHCI=y
 # CONFIG_DEEP_SLEEP is not set
+CONFIG_LAYERSCAPE_NS_ACCESS=y
 CONFIG_KM_DEF_NETDEV="eth2"
 CONFIG_KM_COMMON_ETH_INIT=y
 CONFIG_PIGGY_MAC_ADDRESS_OFFSET=3