staging: media: lirc: lirc_sir.c: use pr_debug and dev_dbg instead of dprintk

This patch removes the custom printk macro dprintk and replaces most of
the calls made to it by dev_dbg. pr_debug was used when the calling
function did not provide the appropiate device variable.

Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>