OPTEE-SDK: Add to SDK environment-setup the variables required to build OP-TEE TA.

Change-Id: I13a6e1f85f785ca4ce9cbb34dc2e46a16e4ca273
Signed-off-by: Cedric VINCENT <cedric.vincent@foss.st.com>

conf/machine/include/st-machine-common-stm32mp.inc

@@ -430,6 +430,11 @@ ST_TOOLS_FOR_SDK_append = " \
     nativesdk-svd-tools \
     "
 
+# For Trusted Application development using OP-TEE TA SDK
+ST_TOOLS_FOR_SDK_append = " \
+    nativesdk-optee-sdk \
+    "
+
 # Fip tool
 ST_TOOLS_FOR_SDK_append = " \
     ${@bb.utils.contains('MACHINE_FEATURES', 'fip', 'nativesdk-${FIPTOOL_WRAPPER}', '', d)} \