cxl: Remove duplicate included header file core.h

The header file core.h is included twice. Remove the last
one. The compilation test has passed.

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20240830080016.3542184-1-lihongbo22@huawei.com


Signed-off-by: Dave Jiang <dave.jiang@intel.com>