staging/olpc_dcon: fix checkpatch warnings
The below checkpatch warnings was fixed, - WARNING: Prefer pr_debug(... to printk(KERN_DEBUG, ... - WARNING: Prefer pr_warn(... to printk(KERN_WARNING, ... - WARNING: Prefer pr_info(... to printk(KERN_INFO, ... - WARNING: Prefer pr_err(... to printk(KERN_ERR, ... And added pr_fmt. Signed-off-by: Toshiaki Yamane <yamanetoshi@gmail.com> Acked-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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