take in count O_NONBLOCK flag for rtas log

[David Howells]

Vitaly Mayatskikh <v.mayatskih at gmail.com> wrote:

> +		if (!logging_enabled) {
> +			spin_unlock_irqrestore(&rtasd_log_lock, s);
> +			error = -ENODATA;
> +			goto out;
> +		} else
> +			nvram_clear_error_log();

The 'else' here is unnecessary.  It's preceded inside the curlies by a goto.

David