Modify clearSEL

After clearing the log, adding the log does not start from 1,
use deleteAll method to clearSEL.

Tested :Run `ipmitool sel clear&&ipmitool sel list`:
 1 | 05/23/21 | 09:01:11 UTC | Event Logging Disabled #0x8b | Log area reset/cleared | Asserted

Signed-off-by: Lotus Xu <xuxiaohan@bytedance.com>
Change-Id: Ic1e63c3334adf77f54f36bebfed459138a215f06
2 files changed