kho: remove duplicate header file references

kho: remove duplicate header file references

kexec_handover_internal.h is included twice in kexec_handover.c.  Remove
the redundant first inclusion to eliminate the duplication.

Link: https://lkml.kernel.org/r/20251216114400.2677311-1-longwei27@huawei.com
Signed-off-by: Long Wei <longwei27@huawei.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Alexander Graf <graf@amazon.com>
Cc: hewenliang <hewenliang4@huawei.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Pratyush Yadav <pratyush@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>