[OE-core] [PATCH] meta: replace deprecated "SERIAL_CONSOLE"

[Maciej Pijanowski]

SERIAL_CONSOLE was already deprecated in 2013, yet still some
machine configuration files were using it. This patch replaces
it with SERIAL_CONSOLES, which is the successor.

The default value in systemd-serialgetty.bb can also be safely
transitioned from SERIAL_CONSOLE to SERIAL_CONSOLES, as this
recipe already uses SERIAL_CONSOLES within do_install().

The documentation seems to be already up do date.
beaglebone-yocto.conf in the bsp-guide already uses
SERIAL_CONSOLES. The ref-manual redirects from SERIAL_CONSOLE
to SERIAL_CONSOLES.

[YOCTO #12653]

Signed-off-by: Maciej Pijanowski <maciej.pijanowski at 3mdeb.com>
---
 meta/conf/machine/include/x86-base.inc           | 2 +-
 meta/recipes-core/systemd/systemd-serialgetty.bb | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta/conf/machine/include/x86-base.inc b/meta/conf/machine/include/x86-base.inc
index be037beb290f..06de778b5bf9 100644
--- a/meta/conf/machine/include/x86-base.inc
+++ b/meta/conf/machine/include/x86-base.inc
@@ -12,7 +12,7 @@ IMAGE_FSTYPES ?= "hddimg"
 
 KERNEL_IMAGETYPE ?= "bzImage"
 
-SERIAL_CONSOLE ?= "115200 ttyS0"
+SERIAL_CONSOLES ?= "115200;ttyS0"
 
 #
 # kernel-related variables
diff --git a/meta/recipes-core/systemd/systemd-serialgetty.bb b/meta/recipes-core/systemd/systemd-serialgetty.bb
index d67a3c91b4a6..65a931f418de 100644
--- a/meta/recipes-core/systemd/systemd-serialgetty.bb
+++ b/meta/recipes-core/systemd/systemd-serialgetty.bb
@@ -5,7 +5,7 @@ LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/GPL-2.0;md5=80
 
 PR = "r5"
 
-SERIAL_CONSOLE ?= "115200 ttyS0"
+SERIAL_CONSOLES ?= "115200;ttyS0"
 
 SRC_URI = "file://serial-getty@.service"
 
-- 
2.17.1