Introduce new SERIAL_CONSOLES to add multiple consoles for your MACHINE

Just define additional serial consoles like so:

SERIAL_CONSOLES="115200;ttyS0 115200;ttyS1 ... 115200;ttySN"

Also be sure to remove SERIAL_CONSOLE (lacking the S) from your
machine as they can conflict.

(From OE-Core rev: a61b5e980d45df4dc2c83dd13996b0563fddf803)

Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/sysvinit/sysvinit-inittab_2.88dsf.bb

@@ -25,6 +25,16 @@ do_install() {
     if [ ! -z "${SERIAL_CONSOLE}" ]; then
         echo "S:2345:respawn:${base_sbindir}/getty ${SERIAL_CONSOLE}" >> ${D}${sysconfdir}/inittab
     fi
+
+    idx=0
+    tmp="${SERIAL_CONSOLES}"
+    for i in $tmp
+    do
+	j=`echo ${i} | sed s/\;/\ /g`
+        echo "${idx}:2345:respawn:${base_sbindir}/getty ${j}" >> ${D}${sysconfdir}/inittab
+	idx=`expr $idx + 1`
+    done
+
     if [ "${USE_VT}" = "1" ]; then
         cat <<EOF >>${D}${sysconfdir}/inittab
 # ${base_sbindir}/getty invocations for the runlevels.