[submodule] Update submodule sonic-linux-kernel to the latest HEAD automatically (#15782)

#### Why I did it
src/sonic-linux-kernel
```
* d070cae - (HEAD -> master, origin/master, origin/HEAD) arm64: dts: marvell: Add Nokia 7215-IXS-A1 board (#321) (34 hours ago) [Pavan-Nokia]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2023-07-12 16:37:25 +08:00 committed by GitHub
parent e3fc93d069
commit 4f4559cf15
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

@ -1 +1 @@
Subproject commit e7c93a542272b5952a1082326c097ec7633f881b
Subproject commit d070cae8e92ae3cd9798546e27d796a71fd7e914