net: hns3: uniform type of function parameter cmd

The parameter cmd in function definition of hns3_dbg_bd_file_init and
hns3_dbg_common_file_init is used type u32, this patch uniforms them
in function declaration to type u32 too.

Signed-off-by: Hao Chen <chenhao288@hisilicon.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>