staging: lirc: Fix sparse warnings

Fix sparse warnings by adding __user and __iomem annotations where
necessary and removing certain unnecessary casts. While at it,
also use u32 in place of __u32.

Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/media/lirc/lirc_bt829.c
Simple merge

diff --cc drivers/staging/media/lirc/lirc_parallel.c
Simple merge

diff --cc drivers/staging/media/lirc/lirc_serial.c
Simple merge

diff --cc drivers/staging/media/lirc/lirc_sir.c
Simple merge

diff --cc drivers/staging/media/lirc/lirc_zilog.c
Simple merge