Boot.adoc : update kernel part

documentation/asciidoc/computers/config_txt/boot.adoc

@@ -37,15 +37,15 @@ Set the `disable_commandline_tags` command to `1` to stop `start.elf` from filli
 
 === `kernel`
 
-`kernel` is the alternative filename on the boot partition to use when loading the kernel. The default value on the Pi 1, Pi Zero, and Compute Module is `kernel.img`, and on the Pi 2, Pi 3, and Compute Module 3 it is `kernel7.img`. On the Pi4, it is `kernel7l.img`.
+`kernel` is the alternative filename on the boot partition to use when loading the kernel. The default value on the Raspberry Pi 1, Zero and Zero W, and Raspberry Pi Compute Module 1 is `kernel.img`. The default value on the Raspberry Pi 2, 3, 3+ and Zero 2 W, and Raspberry Pi Compute Modules 3 and 3+ is `kernel7.img`. The default value on the Raspberry Pi 4 and 400, and Raspberry Pi Compute Module 4 is `kernel7l.img`.
 
 === `arm_64bit`
 
 If set to non-zero, forces the kernel loading system to assume a 64-bit kernel, starts the processors up in 64-bit mode, and sets `kernel8.img` to be the kernel image loaded, unless there is an explicit `kernel` option defined in which case that is used instead. Defaults to 0 on all platforms. 
 
 NOTE: 64-bit kernels may be uncompressed image files or a gzip archive of an image (which can still be called kernel8.img; the bootloader will recognize the archive from the signature bytes at the beginning).
 
-NOTE: The 64-bit kernel will only work on the Raspberry Pi 4, 3, and 2B rev 1.2 boards with latest firmware.
+NOTE: The 64-bit kernel will only work on the Raspberry Pi 3, 3+, 4, 400, Zero 2 W and 2B rev 1.2, and Raspberry Pi Compute Modules 3, 3+ and 4.
 
 === `arm_control`
 
@@ -154,7 +154,7 @@ Pi 4B and Pi 400 (not CM4 or CM4IO) add a high performance USB 3 controller, att
 
 `otg_mode=1` requests that a more capable XHCI USB 2 controller is used as another host controller on that USB-C connector. 
 
-NOTE: Because CM4 and CM4IO don't include the external USB 3 controller RaspberryPi OS images set `otg_mode=1` on CM4 for better performance.
+NOTE: Because CM4 and CM4IO don't include the external USB 3 controller, Raspberry Pi OS images set `otg_mode=1` on CM4 for better performance.
 
 [[overlay_prefix]]
 === `overlay_prefix`