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/ls1021atsn_qspi_defconfig b/configs/ls1021atsn_qspi_defconfig
index cfa83b8..fb89c21 100644
--- a/configs/ls1021atsn_qspi_defconfig
+++ b/configs/ls1021atsn_qspi_defconfig
@@ -14,6 +14,7 @@
 CONFIG_DEFAULT_DEVICE_TREE="ls1021a-tsn"
 CONFIG_SYS_LOAD_ADDR=0x82000000
 CONFIG_AHCI=y
+CONFIG_LAYERSCAPE_NS_ACCESS=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_OF_BOARD_SETUP=y