config: Add missing import of 'fatal' in CpuConfig

Change-Id: I7762d344cb964c3e010135ff928c6ea12538912c
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Gabor Dozsa <gabor.dozsa@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/3941
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

configs/common/CpuConfig.py

@@ -35,6 +35,7 @@
 #
 # Authors: Andreas Sandberg
 
+from m5 import fatal
 import m5.objects
 import inspect
 import sys