In rte_fpga_do_pr() function, if 'stat' return error the
'file_fd' is never closed thus leading a fd leak.
This patch avoids this.
Coverity issue: 279441
Fixes: ef1e8ede3da59e ("raw/ifpga: add Intel FPGA bus rawdev driver")
Cc: stable@dpdk.org
Signed-off-by: Li Qiang <liq3ea@163.com>
Acked-by: Rosen Xu <rosen.xu@intel.com>