arm: mach-k3: Add secure device support

K3 devices have High Security (HS) variants along with the non-HS already
supported. Like the previous generation devices (OMAP/Keystone2) K3
supports boot chain-of-trust by authenticating and optionally decrypting
images as they are unpacked from FIT images. Add support for this here.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Andreas Dannenberg <dannenberg@ti.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dd5ac69..0a76138 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1464,7 +1464,7 @@
 
 config TI_SECURE_DEVICE
 	bool "HS Device Type Support"
-	depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS
+	depends on ARCH_KEYSTONE || ARCH_OMAP2PLUS || ARCH_K3
 	help
 	  If a high secure (HS) device type is being used, this config
 	  must be set. This option impacts various aspects of the