arm64/fpsimd: Fix typo in comment

Delete the redundant word 'in'.
Signed-off-by: NXiang wangx <wangxiang@cdjrlc.com>
Link: https://lore.kernel.org/r/20220610070543.59338-1-wangxiang@cdjrlc.comSigned-off-by: NCatalin Marinas <catalin.marinas@arm.com>

arch/arm64/kernel/fpsimd.c

@@ -331,7 +331,7 @@ void task_set_vl_onexec(struct task_struct *task, enum vec_type type,
  *    trapping to the kernel.
  *
  *    When stored, Z0-Z31 (incorporating Vn in bits[127:0] or the
- *    corresponding Zn), P0-P15 and FFR are encoded in in
+ *    corresponding Zn), P0-P15 and FFR are encoded in
  *    task->thread.sve_state, formatted appropriately for vector
  *    length task->thread.sve_vl or, if SVCR.SM is set,
  *    task->thread.sme_vl.