Python 3 doesn't support tuple unpacking in function parameters and lambdas. Change-Id: I36c72962e33a9ad37145089687834becccc76adb Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-on: https://gem5-review.googlesource.com/c/15991 Reviewed-by: Gabe Black <gabeblack@google.com>