[ARM] S3C24XX: Serial driver debug depends on DEBUG_LL

The SERIAL_SAMSUNG_DEBUG used printascii() to avoid debugging
through itself when selected as a console. Disable this option
when DEBUG_LL is not set (printascii is unavailable).
Signed-off-by: NBen Dooks <ben-linux@fluff.org>

drivers/serial/Kconfig

@@ -457,7 +457,7 @@ config SERIAL_SAMSUNG
 
 config SERIAL_SAMSUNG_DEBUG
 	bool "Samsung SoC serial debug"
-	depends on SERIAL_SAMSUNG
+	depends on SERIAL_SAMSUNG && DEBUG_LL
 	help
 	  Add support for debugging the serial driver. Since this is
 	  generally being used as a console, we use our own output