northbridge/amd/amdmct: Fix crash on startup due to NULL pointer access

Change-Id: I47089f2ad886a6fda4e0cd4472efd975bb8e06c5
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/11995
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>
Tested-by: build bot (Jenkins)
1 file changed