enable serial output again

target/config/Config.in

@@ -317,6 +317,7 @@ config ADK_TARGET_CMDLINE
 	default "console=ttyS0,38400" if ADK_TARGET_SYSTEM_PCENGINES_WRAP
 	default "console=ttyS0,115200 console=tty0 geodewdt.nowayout=1" if ADK_TARGET_SYSTEM_PCENGINES_ALIX1C
 	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_IBM_X40
+	default "console=ttyS0,115200 console=tty0" if ADK_TARGET_SYSTEM_QEMU_X86
 	default "console=ttyS0,115200" if ADK_TARGET_SYSTEM_PCENGINES_ALIX2D13
 	default "console=ttyS0,115200" if ADK_TARGET_SYSTEM_PCENGINES_ALIX2D2
 	default "console=ttyS0,115200" if ADK_TARGET_SYSTEM_FOXBOARD_LX