scripts/runqemu: Add always ttyS1 when no serial options are specified
We always wants ttyS0 and ttyS1 in qemu machines (see SERIAL_CONSOLES),
if not serial or serialtcp options was specified only ttyS0 is created
and sysvinit shows an error trying to enable ttyS1:
INIT: Id "S1" respawning too fast: disabled for 5 minutes
[YOCTO #10491]
(From OE-Core rev:
3a0efbbe6bb5a7f0fb3df0f6052b11e56788405f)
Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
