logging: Move frontends to the dedicated directory

As there are more frontends coming in the future move existing
frontend to the dedicated directory (like backends).

Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>

subsys/logging/CMakeLists.txt

@@ -43,17 +43,13 @@ if(NOT CONFIG_LOG_MODE_MINIMAL)
     log_cmds.c
   )
 
-  zephyr_sources_ifdef(
-    CONFIG_LOG_FRONTEND_DICT_UART
-    log_frontend_dict_uart.c
-  )
-
   zephyr_sources_ifdef(
     CONFIG_LOG_DICTIONARY_SUPPORT
     log_output_dict.c
   )
 
   add_subdirectory(backends)
+  add_subdirectory(frontends)
 
   # For some reason, running sys-t with catalog message on
   # Cortex-M0 would result in hard fault in mipi_catalog_formatter()

subsys/logging/Kconfig

@@ -37,7 +37,7 @@ endif # !LOG_MODE_MINIMAL
 
 if LOG_FRONTEND
 
-rsource "Kconfig.frontends"
+rsource "frontends/Kconfig"
 
 endif #LOG_FRONTEND
 

subsys/logging/frontends/CMakeLists.txt

@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_sources_ifdef(
+  CONFIG_LOG_FRONTEND_DICT_UART
+  log_frontend_dict_uart.c
+)