bsp guide: update kernel version example to 6.12

Change the sample kernel version being used from 4.4 to a more modern
6.12.

(From yocto-docs rev: 1bad12b6ccfe1c0d26918926176a0c743568de26)

Signed-off-by: "Robert P. J. Day" <rpjday@crashcourse.ca>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Signed-off-by: Antonin Godard <antonin.godard@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/bsp-guide/bsp.rst

@@ -674,21 +674,21 @@ to the kernel recipe by using a similarly named append file, which is
 located in the BSP Layer for your target device (e.g. the
 ``meta-bsp_root_name/recipes-kernel/linux`` directory).
 
-Suppose you are using the ``linux-yocto_4.4.bb`` recipe to build the
+Suppose you are using the ``linux-yocto_6.12.bb`` recipe to build the
 kernel. In other words, you have selected the kernel in your
 ``"bsp_root_name".conf`` file by adding
 :term:`PREFERRED_PROVIDER` and :term:`PREFERRED_VERSION`
 statements as follows::
 
    PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
-   PREFERRED_VERSION_linux-yocto ?= "4.4%"
+   PREFERRED_VERSION_linux-yocto ?= "6.12%"
 
 .. note::
 
    When the preferred provider is assumed by default, the :term:`PREFERRED_PROVIDER`
    statement does not appear in the ``"bsp_root_name".conf`` file.
 
-You would use the ``linux-yocto_4.4.bbappend`` file to append specific
+You would use the ``linux-yocto_6.12.bbappend`` file to append specific
 BSP settings to the kernel, thus configuring the kernel for your
 particular BSP.
 
@@ -698,14 +698,19 @@ in the Yocto Project Linux Kernel Development Manual.
 
 An alternate scenario is when you create your own kernel recipe for the
 BSP. A good example of this is the Raspberry Pi BSP. If you examine the
-``recipes-kernel/linux`` directory you see the following::
+``recipes-kernel/linux`` directory in that layer you see the following
+Raspberry Pi-specific recipes and associated files::
 
+   files/
+   linux-raspberrypi_6.12.bb
+   linux-raspberrypi_6.1.bb
+   linux-raspberrypi_6.6.bb
    linux-raspberrypi-dev.bb
    linux-raspberrypi.inc
-   linux-raspberrypi_4.14.bb
-   linux-raspberrypi_4.9.bb
-
-The directory contains three kernel recipes and a common include file.
+   linux-raspberrypi-v7_6.12.bb
+   linux-raspberrypi-v7_6.1.bb
+   linux-raspberrypi-v7_6.6.bb
+   linux-raspberrypi-v7.inc
 
 Developing a Board Support Package (BSP)
 ========================================