[zephyr] Added Kconfig options to control Matter logs level

Zephyr logging platform currently uses hardcoded DEBUG log level
and it's not possible to change it through KConfig options.

Added MATTER logging module to Zephyr subsys and enabled setting
Matter logs level using CONFIG_MATTER_LOG_LEVEL option.

config/zephyr/Kconfig

@@ -125,4 +125,8 @@ config APP_LINK_WITH_CHIP
 	  Add Connected Home over IP header files to the 'app' include path
 	  and link the 'app' with Connected Home over IP libraries.
 
+module = MATTER
+module-str = Matter
+source "${ZEPHYR_BASE}/subsys/logging/Kconfig.template.log_config"
+
 endif

src/platform/Zephyr/Logging.cpp

@@ -18,7 +18,7 @@
 #define LOG_MESSAGE(msg) (msg)
 #endif
 
-LOG_MODULE_REGISTER(chip, LOG_LEVEL_DBG);
+LOG_MODULE_REGISTER(chip, CONFIG_MATTER_LOG_LEVEL);
 
 namespace chip {
 namespace DeviceLayer {