preempt/dynamic: Fix setup_preempt_mode() return value

mainline inclusion
from mainline-v6.5-rc7
commit 9ed20baf
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8BAX7


CVE: NA

--------------------------------

__setup() callbacks expect 1 for success and 0 for failure. Correct the
usage here to reflect that.

Fixes: 826bfeb3 ("preempt/dynamic: Support dynamic preempt with preempt= boot option")
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211203233203.133581-1-ahalaney@redhat.com


Signed-off-by: Xia Fukun <xiafukun@huawei.com>