machines: Allow user to override SERIAL_CONSOLE
Also remove the default SERIAL_CONSOLE_CHECK.
@@ -16,8 +16,7 @@ EXTRA_IMAGEDEPENDS += " \
virtual/bootloader \
"
-SERIAL_CONSOLES = "115200;ttyPS0"
-SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
+SERIAL_CONSOLES ?= "115200;ttyPS0"
MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "device-tree"
