[submodule] Update submodule sonic-linux-kernel to the latest HEAD automatically (#17231)

#### Why I did it
src/sonic-linux-kernel
```
* 6ff3cc2 - (HEAD -> 202305, origin/202305) arm64: Kconfig inclusions to fix PCI hang and MTD detection (#362) (2 days ago) [Pavan Naregundi]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2023-11-21 16:34:34 +08:00 committed by GitHub
parent 8dc776bebb
commit a4e5b83e3a
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@ -1 +1 @@
Subproject commit f086121cf8a3ef581e6aaf603a51f1e8e7efcd85 Subproject commit 6ff3cc2ae1818d4c69b7b50c2ac1728d370ea35e