Convert CONFIG_ARMV7_SECURE_BASE et al to Kconfig

This converts the following to Kconfig:
   CONFIG_ARMV7_SECURE_BASE
   CONFIG_ARMV7_SECURE_MAX_SIZE
   CONFIG_ARMV7_SECURE_RESERVE_SIZE

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 af1812b..1ca468a 100644
--- a/configs/pg_wcom_seli8_update_defconfig
+++ b/configs/pg_wcom_seli8_update_defconfig
@@ -19,6 +19,7 @@
 CONFIG_DEFAULT_DEVICE_TREE="ls1021a-pg-wcom-seli8"
 CONFIG_BOOTCOUNT_BOOTLIMIT=3
 CONFIG_SYS_BOOTCOUNT_ADDR=0x70000020
+# CONFIG_HAS_ARMV7_SECURE_BASE is not set
 CONFIG_AHCI=y
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SYS_LOAD_ADDR=0x82000000