segger: config: support RTT section custom definition in Zephyr DTS

Allow to define the name of custom RTT section both when it's configured
to be placed at RAM start and when its address is defined by a memory
region in DTS.

Signed-off-by: Giancarlo Stasi <[email protected]>

Author: giansta

Config/SEGGER_RTT_Conf.h

@@ -98,7 +98,7 @@ Revision: $Rev: 24316 $
 #define SEGGER_RTT_SECTION                        ".dtcm_data"
 #elif defined(CONFIG_SEGGER_RTT_SECTION_CCM)
 #define SEGGER_RTT_SECTION                        ".ccm_data"
-#elif defined(CONFIG_SEGGER_RTT_SECTION_CUSTOM)
+#elif defined(CONFIG_SEGGER_RTT_SECTION_CUSTOM) || defined(CONFIG_SEGGER_RTT_SECTION_CUSTOM_DTS_REGION)
 #define SEGGER_RTT_SECTION                        CONFIG_SEGGER_RTT_SECTION_CUSTOM_NAME
 #endif