uacce: fix isolate sysfs check condition

In the Linux kernel, the following vulnerability has been resolved:

uacce: fix isolate sysfs check condition

uacce supports the device isolation feature. If the driver

implements the isolate_err_threshold_read and

isolate_err_threshold_write callback functions, uacce will create

sysfs files now. Users can read and configure the isolation policy

through sysfs. Currently, sysfs files are created as long as either

isolate_err_threshold_read or isolate_err_threshold_write callback

functions are present.

However, accessing a non-existent callback function may cause the

system to crash. Therefore, intercept the creation of sysfs if

neither read nor write exists; create sysfs if either is supported,

but intercept unsupported operations at the call site.