imx: replace CONFIG_SECURE_BOOT with CONFIG_IMX_HAB

CONFIG_SECURE_BOOT is too generic and forbids to use it for cross
architecture purposes. If Secure Boot is required for imx, this means to
enable and use the HAB processor in the soc.

Signed-off-by: Stefano Babic <sbabic@denx.de>
diff --git a/Makefile b/Makefile
index 733bcec..80b7811 100644
--- a/Makefile
+++ b/Makefile
@@ -830,10 +830,10 @@
 endif
 endif
 ALL-$(CONFIG_SPL) += spl/u-boot-spl.bin
-ifeq ($(CONFIG_MX6)$(CONFIG_SECURE_BOOT), yy)
+ifeq ($(CONFIG_MX6)$(CONFIG_IMX_HAB), yy)
 ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot-ivt.img
 else
-ifeq ($(CONFIG_MX7)$(CONFIG_SECURE_BOOT), yy)
+ifeq ($(CONFIG_MX7)$(CONFIG_IMX_HAB), yy)
 ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot-ivt.img
 else
 ALL-$(CONFIG_SPL_FRAMEWORK) += u-boot.img