Revert "segger: rtt: disable unsupported shell/log features"

This reverts commit c88a9ef272.

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

modules/segger/Kconfig

@@ -39,7 +39,6 @@ config SEGGER_RTT_BUFFER_SIZE_UP
 
 config SEGGER_RTT_BUFFER_SIZE_DOWN
 	int "Size of the buffer for terminal input of target, from host"
-	default 32 if SHELL_BACKEND_RTT
 	default 16
 
 config SEGGER_RTT_PRINTF_BUFFER_SIZE

subsys/logging/backends/Kconfig.uart

@@ -4,7 +4,7 @@
 config LOG_BACKEND_UART
 	bool "UART backend"
 	depends on UART_CONSOLE
-	default y if !SHELL_BACKEND_SERIAL && !SHELL_BACKEND_RTT
+	default y if !SHELL_BACKEND_SERIAL
 	select LOG_BACKEND_SUPPORTS_FORMAT_TIMESTAMP
 	help
 	  When enabled backend is using UART to output logs.

subsys/shell/Kconfig

@@ -114,7 +114,7 @@ config SHELL_ARGC_MAX
 
 config SHELL_TAB
 	bool "The Tab button support in shell"
-	default y if !SHELL_MINIMAL && !SHELL_BACKEND_RTT
+	default y if !SHELL_MINIMAL
 	help
 	  Enable using the Tab button in the shell. The button
 	  can be used for prompting commands, or for autocompletion.
@@ -169,7 +169,7 @@ config SHELL_START_OBSCURED
 
 config SHELL_VT100_COMMANDS
 	bool "VT100 commands in shell"
-	default y if !SHELL_BACKEND_RTT
+	default y
 	help
 	  Enables VT100 commands in shell (e.g. cursor position, clear screen etc.).
 

subsys/shell/backends/Kconfig.backends

@@ -16,8 +16,6 @@ DT_CHOSEN_Z_SHELL_UART := zephyr,shell-uart
 
 config SHELL_BACKEND_SERIAL
 	bool "Serial backend"
-	# Serial (UART) requires interrupts and the RTT backend cannot be used from an ISR context.
-	default n if SHELL_BACKEND_RTT
 	default "$(dt_chosen_enabled,$(DT_CHOSEN_Z_SHELL_UART))"
 	select SERIAL
 	select RING_BUFFER