drivers/staging/speakup/: avoid world-writable sysfs files.

In line with practice for module parameters, we're adding a build-time
check that sysfs files aren't world-writable.

Cc: Christopher Brannon <chris@the-brannons.com>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/speakup/kobjects.c
Simple merge

diff --cc drivers/staging/speakup/speakup_acntpc.c
Simple merge

diff --cc drivers/staging/speakup/speakup_acntsa.c
Simple merge

diff --cc drivers/staging/speakup/speakup_apollo.c
Simple merge

diff --cc drivers/staging/speakup/speakup_audptr.c
Simple merge

diff --cc drivers/staging/speakup/speakup_bns.c
Simple merge

diff --cc drivers/staging/speakup/speakup_decext.c
Simple merge

diff --cc drivers/staging/speakup/speakup_decpc.c
Simple merge

diff --cc drivers/staging/speakup/speakup_dectlk.c
Simple merge

diff --cc drivers/staging/speakup/speakup_dtlk.c
Simple merge

diff --cc drivers/staging/speakup/speakup_dummy.c
Simple merge

diff --cc drivers/staging/speakup/speakup_keypc.c
Simple merge

diff --cc drivers/staging/speakup/speakup_ltlk.c
Simple merge

diff --cc drivers/staging/speakup/speakup_soft.c
Simple merge

diff --cc drivers/staging/speakup/speakup_spkout.c
Simple merge

diff --cc drivers/staging/speakup/speakup_txprt.c
Simple merge