apic: fixing the mwait hang issue during s3 exit

apic: fixing the mwait hang issue during s3 exit

BZ: 16590

This patch was missed in the pmu driver s3 enabling. This is a very
important patch where we dont disable lapic when we are entering S3.
In cases where there is a mwait failure & scu aborts, pmu interrupt
will not be forwarded to IA as lapic is suspended & system will hang
with bothcpu's in mwait state. hence in this patch we try to have a
seperate lapic_suspend/resume routines specific to our platform.

Change-Id: I8903d353ea038280d6276f44c25e8b36fb2458bf
Signed-off-by: Vishwesh M Rudramuni <vishwesh.m.rudramuni@intel.com>
Reviewed-on: http://android.intel.com:8080/26281
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Tested-by: Seibel, Eric <eric.seibel@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>