rp2040 able to get log with rtt

add note for segger rtt block search range

hw/bsp/rp2040/family.cmake

@@ -5,6 +5,7 @@ target_link_libraries(${PROJECT}
 )
 
 pico_add_extra_outputs(${PROJECT})
+pico_enable_stdio_uart(${PROJECT} 1)
 
 # TinyUSB Stack source
 set(SRC_TINYUSB
@@ -50,12 +51,9 @@ target_compile_definitions(${PROJECT} PUBLIC
 
 if(DEFINED LOG)
   target_compile_definitions(${PROJECT} PUBLIC CFG_TUSB_DEBUG=${LOG} )
-  pico_enable_stdio_uart(${PROJECT} 1)
 endif()
 
 if(LOGGER STREQUAL "rtt")
-  pico_enable_stdio_uart(${PROJECT} 0)
-
   target_compile_definitions(${PROJECT} PUBLIC
     LOGGER_RTT
     SEGGER_RTT_MODE_DEFAULT=SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL