dev: Include the platform base class even in NULL_ISA builds.

These classes don't have any ISA specific aspects.

Change-Id: Ifefb12d23e4aee8e3fd56f0a1eb3d9ad00e733a0
Reviewed-on: https://gem5-review.googlesource.com/c/13467
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
1 file changed