staging: vme/devices: vme_user.c: fix: converted decimal permissions to octal

Ran checkpatch.pl -f vme_user.c
Fixed: ERROR: Use 4 digit octal (0777) not decimal permissions

Signed-off-by: Ryan Swan <ryan@ryanswan.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>