Use syslog for the IPMI SEL commands

Since the journal will not be persistent, the IPMI SEL logs will
be persisted to syslog instead. This change converts the IPMI
Get SEL Info, Get SEL Entry, and Clear SEL commands to use
syslog.

It also changes those commands and the Set SEL Time override to
the new IPMI API.

Tested:
Added IPMI SEL entries using a sensor override and ran the following
commands:
ipmitool sel info
ipmitool sel list
ipmitool sel get 0
ipmitool sel get 0xffff
ipmitool sel get 10
ipmitool sel clear

Confirmed that each command returns accurate data and behaves as
expected.

Change-Id: I961e6d4466a97035f73dcbaf706aacbe80acee19
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
2 files changed