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/pinecube_defconfig b/configs/pinecube_defconfig
index e779663..28e347b 100644
--- a/configs/pinecube_defconfig
+++ b/configs/pinecube_defconfig
@@ -7,6 +7,7 @@
 CONFIG_DRAM_CLK=504
 CONFIG_DRAM_ODT_EN=y
 CONFIG_I2C0_ENABLE=y
+# CONFIG_HAS_ARMV7_SECURE_BASE is not set
 CONFIG_SPL_I2C=y
 CONFIG_SPL_SYS_I2C_LEGACY=y
 CONFIG_SYS_I2C_MVTWSI=y