Staging: silicom: remove S_IWOTH from proc declaration

We don't need these to be world writable or group writable.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Daniel Cotey <puff65537@bansheeslibrary.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>