CVE-2024-56628 LoongArch: Add architecture specific huge_pte_clear()

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Add architecture specific hugepteclear When executing mm selftests runvmtests.sh, there is such an error: BUG: Bad page state in process uffd-unit-tests pfn:00000 page: refcount:0 mapcount:0 mapping:0000000000000000...