ipmi:watchdog: Set panic count to proper value on a panic

mainline inclusion
from v5.16-rc1
commit db05ddf7
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5DVR9
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=db05ddf7f321634c5659a0cf7ea56594e22365f7



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

You will get two decrements when the messages on a panic are sent, not
one, since commit 2033f685 ("ipmi: Free receive messages when in an
oops") was added, but the watchdog code had a bug where it didn't set
the value properly.

Reported-by: Anton Lundin <glance@acc.umu.se>
Cc: <Stable@vger.kernel.org> # v5.4+
Fixes: 2033f685 ("ipmi: Free receive messages when in an oops")
Signed-off-by: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Li JinLin <lijinlin3@huawei.com>
Acked-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>