Remove bitfields from the SEL record structures

Bitfields are not endian-safe, so this change removes the
bitfields from the SEL record structures and defines the
event direction as an offset.

Tested:
Confirmed that SEL events are still added and listed with the
correct assertion state.

Change-Id: I4b7428d28b2738f729612e6d793a61694853f89a
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
2 files changed