atm: idt77252: fix dev refcnt leak
init_card() calls dev_get_by_name() to get a network deceive. But it doesn't decrease network device reference count after the device is used. Signed-off-by: NYing Xue <ying.xue@windriver.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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