Syncs the linux-realme-x3 kernel config with kconfigcheck.toml and builds the kernel with LLVM to follow policy. See https://postmarketos.org/edge/2025/11/11/kernels-llvm/ Signed-off-by: Aster Boese <asterboese@mailbox.org> Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/8119>