soc/intel/cannonlake: Fix Coverity scan error

Add return in case of null pointer to avoid coverity scan error, fixed
  1.Coverity ID 1379849:  Null pointer dereferences  (FORWARD_NULL)
  2.Coverity ID 1379848:  Null pointer dereferences  (FORWARD_NULL)

Change-Id: Ica19735307736c8a55c29af88db8b1372f8779e4
Signed-off-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/21155
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Pratikkumar V Prajapati <pratikkumar.v.prajapati@intel.com>

0 files changed, 0 insertions, 0 deletions