package/optee-examples: add option to use same version as optee-os

We can select a custom official version for the optee-os package; add an
option to select the same version for optee-examples, to easily keep them
synchronized.

Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>
Cc: Étienne Carrière <etienne.carriere@foss.st.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/optee-examples/Config.in

@@ -31,10 +31,16 @@ if BR2_PACKAGE_OPTEE_EXAMPLES
 
 choice
 	prompt "optee-examples version"
+	default BR2_PACKAGE_OPTEE_EXAMPLES_AS_OS \
+				if BR2_TARGET_OPTEE_OS_CUSTOM_VERSION
 	default BR2_PACKAGE_OPTEE_EXAMPLES_LATEST
 	help
 	  Select the version of optee-examples you want to use
 
+config BR2_PACKAGE_OPTEE_EXAMPLES_AS_OS
+	bool "Same as optee-os being built"
+	depends on BR2_TARGET_OPTEE_OS_CUSTOM_VERSION
+
 config BR2_PACKAGE_OPTEE_EXAMPLES_LATEST
 	bool "4.3.0"
 	help
@@ -64,6 +70,8 @@ endif
 
 config BR2_PACKAGE_OPTEE_EXAMPLES_VERSION
 	string
+	default BR2_TARGET_OPTEE_OS_CUSTOM_VERSION_VALUE \
+				if BR2_PACKAGE_OPTEE_EXAMPLES_AS_OS
 	default "4.3.0"		if BR2_PACKAGE_OPTEE_EXAMPLES_LATEST
 	default "custom"	if BR2_PACKAGE_OPTEE_EXAMPLES_CUSTOM_TARBALL