imx8: Add DEK blob encapsulation

Add DEK encapsulation support for imx8. The DEK blob is generated by the
SECO through the SCFW API.

Signed-off-by: Clement Faure <clement.faure@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 3bcfced..26bfc5c 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -77,6 +77,7 @@
 	bool "Support the 'dek_blob' command"
 	select IMX_CAAM_DEK_ENCAP if ARCH_MX6 || ARCH_MX7 || ARCH_MX7ULP
 	select IMX_OPTEE_DEK_ENCAP if ARCH_IMX8M
+	select IMX_SECO_DEK_ENCAP if ARCH_IMX8
 	help
 	  This enables the 'dek_blob' command which is used with the
 	  Freescale secure boot mechanism. This command encapsulates and
@@ -98,6 +99,12 @@
 	  with OP-TEE is done through a SMC call and OP-TEE shared memory. This
 	  option is available on imx8mm.
 
+config IMX_SECO_DEK_ENCAP
+	bool "Support the DEK blob encapsulation with SECO"
+	help
+	  This enabled the DEK blob encapsulation with the SECO API. This option
+	  is only available on imx8.
+
 config CMD_PRIBLOB
 	bool "Support the set_priblob_bitfield command"
 	depends on HAS_CAAM && IMX_HAB