debug: tracing: Add Segger RTT init mode configuration

Allows RTT inizialization function to either init Cntrol Block always
or initialize only after checking it it's not already initialized by
another program, typically by a bootloader.

Signed-off-by: Giancarlo Stasi <giancarlo.stasi.co@gmail.com>

Author: giansta

modules/segger/Kconfig

@@ -103,4 +103,23 @@ config SEGGER_RTT_SECTION_CUSTOM_NAME
 
 endif
 
+choice SEGGER_RTT_INIT_MODE
+	prompt "RTT Initialization mode"
+	help
+		RTT inizialization function can avoid re-init of Cntrol Block
+		if another program (e.g. bootloader) has already initialized it.
+	default SEGGER_RTT_INIT_MODE_STRONG_CHECK if SEGGER_RTT_SECTION_CUSTOM
+	default SEGGER_RTT_INIT_MODE_STRONG_CHECK
+
+config SEGGER_RTT_INIT_MODE_ALWAYS
+	bool "RTT Initialization done without conditions"
+
+config SEGGER_RTT_INIT_MODE_STRONG_CHECK
+	bool "RTT Initialization done if full check on Control Block ID fails"
+
+config SEGGER_RTT_INIT_MODE_WEAK_CHECK
+	bool "RTT Initialization done if partial check on Control Block ID fails"
+
+endchoice
+
 endif