atl1c: fix indentation issue on an if statement

An if statement is indented one level too deep, fix this by removing
the extra tabs. Also add some spaces to the dev_warn arguments to clean
up checkpatch warnings.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>