[PATCH] sched: hmp: Change small task packing defaults for all

Hi all, this is a proposal to change the default small task packing for TC2 to 'enabled' rather than just present (aligned with all other platforms) and to change the default packing_limit to 650 on all platforms to match the existing TC2 default.

This should by default restrict packing so that it will not cause frequency of the little CPUs to go above 80%. Of course, the presence of bigger tasks can still cause frequency to go up.