Update kernel to builds 8840540 am: 510d47b0bc am: 01b2a95404

Original change: https://googleplex-android-review.googlesource.com/c/kernel/prebuilts/5.15/x86-64/+/19320653

Change-Id: I9a32c1dd6429db6de7ad2c363ff45d6266a7c8ef
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>