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/ls1046ardb_tfa_defconfig b/configs/ls1046ardb_tfa_defconfig
index c068577..2434ed3 100644
--- a/configs/ls1046ardb_tfa_defconfig
+++ b/configs/ls1046ardb_tfa_defconfig
@@ -19,6 +19,7 @@
 CONFIG_SEC_FIRMWARE_ARMV8_PSCI=y
 CONFIG_ENV_ADDR=0x40500000
 CONFIG_AHCI=y
+CONFIG_LAYERSCAPE_NS_ACCESS=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_REMAKE_ELF=y
 CONFIG_MP=y