platform/x86: samsung-laptop: use octal numbers for rwx file permissions

Andy asked me to do it before working further on the code.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210517100746.29663-1-wsa+renesas@sang-engineering.com


Signed-off-by: Hans de Goede <hdegoede@redhat.com>