soc/intel/apollolake: add SMI status bit definitons and use them

Provide the bit definitions for the SMI status register. Also,
utilize them which means deleting some of the handlers that can't
exist because there are no status bits.

BUG=chrome-os-partner:54262

Change-Id: I389c7cb3cad01ba0eca52a337ffee352a2010bfa
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15154
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
3 files changed