drivers: tee: sandbox: SCP03 control emulator

Adds support for a working SCP03 emulation. Input parameters are
validated however the commands (enable, provision) executed by the TEE
are assumed to always succeed.

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/tee/optee/Kconfig b/drivers/tee/optee/Kconfig
index 65622f3..d030280 100644
--- a/drivers/tee/optee/Kconfig
+++ b/drivers/tee/optee/Kconfig
@@ -31,6 +31,12 @@
 	  permits to test reverse RPC calls to TEE supplicant. Should
 	  be used only in sandbox env.
 
+config OPTEE_TA_SCP03
+	bool "Support SCP03 TA"
+	default y
+	help
+	  Enables support for controlling (enabling, provisioning) the
+	  Secure Channel Protocol 03 operation in the OP-TEE SCP03 TA.
 endmenu
 
 endif