bsp-guide: Updated the "beaglebone-yocto.conf" example.

This listing had gone stale.  I updated the actual listing to match
what is in poky repository and adjusted the various variable
explanations affected.

(From yocto-docs rev: 44ccb6ea7301ffa43c89f7a4f28265ea28725f99)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/bsp-guide/bsp.xml

@@ -1902,10 +1902,11 @@
      IMAGE_INSTALL_append = " kernel-devicetree kernel-image-zimage"
      do_image_wic[depends] += "mtools-native:do_populate_sysroot dosfstools-native:do_populate_sysroot"
 
-     SERIAL_CONSOLES = "115200;ttyO0"
+     SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyO0"
+     SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
 
      PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
-     PREFERRED_VERSION_linux-yocto ?= "4.12%"
+     PREFERRED_VERSION_linux-yocto ?= "5.0%"
 
      KERNEL_IMAGETYPE = "zImage"
      KERNEL_DEVICETREE = "am335x-bone.dtb am335x-boneblack.dtb am335x-bonegreen.dtb"
@@ -1913,13 +1914,13 @@
 
      SPL_BINARY = "MLO"
      UBOOT_SUFFIX = "img"
-     UBOOT_MACHINE = "am335x_boneblack_config"
+     UBOOT_MACHINE = "am335x_evm_defconfig"
      UBOOT_ENTRYPOINT = "0x80008000"
      UBOOT_LOADADDRESS = "0x80008000"
 
      MACHINE_FEATURES = "usbgadget usbhost vfat alsa"
 
-     IMAGE_BOOT_FILES ?= "u-boot.${UBOOT_SUFFIX} MLO"
+     IMAGE_BOOT_FILES ?= "u-boot.${UBOOT_SUFFIX} MLO zImage am335x-bone.dtb am335x-boneblack.dtb am335x-bonegreen.dtb"
             </literallayout>
             The variables used to configure the machine define
             machine-specific properties.
@@ -1948,7 +1949,7 @@
                     In this case, the recipe that provides
                     "virtual/xserver" is "xserver-xorg", which
                     exists in
-                    <filename>poky/meta/recipes-graphics/xserver-xorg</filename>.
+                    <filename>poky/meta/recipes-graphics/xorg-xserver</filename>.
                     </para></listitem>
                 <listitem><para>
                     <ulink url='&YOCTO_DOCS_REF_URL;#var-XSERVER'><filename>XSERVER</filename></ulink>:
@@ -2061,7 +2062,7 @@
                 <listitem><para>
                     <ulink url='&YOCTO_DOCS_REF_URL;#var-PREFERRED_VERSION'><filename>PREFERRED_VERSION_linux-yocto</filename></ulink>:
                     Defines the version of the recipe used
-                    to build the kernel, which is "4.12" in this
+                    to build the kernel, which is "5.0" in this
                     case.
                     </para></listitem>
                 <listitem><para>
@@ -2072,8 +2073,8 @@
                     </para></listitem>
                 <listitem><para>
                     <ulink url='&YOCTO_DOCS_REF_URL;#var-KERNEL_DEVICETREE'><filename>KERNEL_DEVICETREE</filename></ulink>:
-                    The name of the generated Linux kernel device
-                    tree (i.e. the <filename>.dtb</filename>) file.
+                    The names of the generated Linux kernel device
+                    trees (i.e. the <filename>*.dtb</filename>) files.
                     All the device trees for the various BeagleBone
                     devices are included.
 <!--
@@ -2146,9 +2147,7 @@
                     Files installed into the device's boot partition
                     when preparing the image using the Wic tool
                     with the <filename>bootimg-partition</filename>
-                    source plugin.
-                    In this case, the "u-boot.${UBOOT_SUFFIX}" and
-                    "MLO" files are installed.
+                    source plug-in.
                     </para></listitem>
             </itemizedlist>
         </para>