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/ls1012afrdm_tfa_defconfig b/configs/ls1012afrdm_tfa_defconfig
index c425a7a..b580a59 100644
--- a/configs/ls1012afrdm_tfa_defconfig
+++ b/configs/ls1012afrdm_tfa_defconfig
@@ -13,6 +13,7 @@
 CONFIG_QSPI_AHB_INIT=y
 CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT=y
 CONFIG_SEC_FIRMWARE_ARMV8_PSCI=y
+CONFIG_LAYERSCAPE_NS_ACCESS=y
 CONFIG_SYS_MEMTEST_START=0x80000000
 CONFIG_SYS_MEMTEST_END=0x9fffffff
 CONFIG_DISTRO_DEFAULTS=y