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_update_defconfig b/configs/pg_wcom_seli8_update_defconfig
index 0f22511..623afa3 100644
--- a/configs/pg_wcom_seli8_update_defconfig
+++ b/configs/pg_wcom_seli8_update_defconfig
@@ -18,6 +18,7 @@
 CONFIG_ENV_ADDR=0x60220000
 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