staging: quickstart: fix up sysfs file permissions
staging: quickstart: fix up sysfs file permissions

Use the default DEVICE_ATTR_RO/RW macros to specify the file permissions
better, and make them easier to audit.

And did we really want any user to be able to write to this file, I kind
of doubt it...

Cc: Jiang Liu <68ee766e574f18b34b683085865827393efe88bd@huawei.com>
Cc: Toshi Kani <322b9f75d3806917607539efc168804d71b9503d@hp.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs