Added serial console to kernel command line to to make it
easier to boot wic images on devices without display.
Tested on MinnowBoard MAX.
(From OE-Core rev: 9a774e3bcd5dc4c85d642acc7bf26095b8c620e4)
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>