CVE-2026-53351 riscv/ptrace: Use USER_REGSET_NOTE_TYPE for REGSET_CFI

In the Linux kernel, the following vulnerability has been resolved: riscv/ptrace: Use USERREGSETNOTETYPE for REGSETCFI Fixes a warning while dumping core: 54983.546369 C7 WARNING: !notename fs/binfmtelf.c:1771 at elfcoredump+0x910/0xf68, CPU7: abort01/31982...