gem5: add defconfig for arm64

Add a default gem5 Linux configuration for arm64

Change-Id: Ib3247dbf99b10078f023b7a393e71c573eccdd4e
Signed-off-by: Geoffrey Blake <Geoffrey.Blake@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
[Updated with 4.9 defaults]
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
1 file changed