sched/smt: Fix unbalance sched_smt_present dec/inc

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

sched/smt: Fix unbalance sched_smt_present dec/inc

I got the following warn report while doing stress test:

jump label: negative count!

WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0

Call Trace:

<TASK>

__static_key_slow_dec_cpuslocked+0x16/0x70

sched_cpu_deactivate+0x26e/0x2a0

cpuhp_invoke_callback+0x3ad/0x10d0

cpuhp_thread_fun+0x3f5/0x680

smpboot_thread_fn+0x56d/0x8d0

kthread+0x309/0x400

ret_from_fork+0x41/0x70

ret_from_fork_asm+0x1b/0x30

</TASK>

Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(),

the cpu offline failed, but sched_smt_present is decremented before

calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so

fix it by incrementing sched_smt_present in the error path.