Staging: irda: drivers: Replace seq_printf with seq_puts or seq_putc

Replace seq_printf with seq_puts or seq_putc when
there is no argument list.

Fix the checkpatch warning:
WARNING: Prefer seq_puts to seq_printf

Signed-off-by: Georgiana Chelu <georgiana.chelu93@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>