toolchain: iar: Add the __deprecated_version macro

Add the `__deprecated_version` macro to print version
information when deprecation warnings are triggered.

Signed-off-by: James Roy <rruuaanng@outlook.com>

Author: rruuaanng

include/zephyr/toolchain/iar/iccarm.h

@@ -185,6 +185,11 @@ do {                                                                    \
 #define __deprecated	__attribute__((deprecated))
 #endif
 
+#ifndef __deprecated_version
+#define __deprecated(version) \
+	__attribute__((deprecated("planned removal in v" #version)))
+#endif
+
 #define FUNC_NO_STACK_PROTECTOR _Pragma("no_stack_protect")
 
 #ifndef __attribute_const__