sched: set initial task load to just above a small task

To maximize power savings, set the intial load of newly created
tasks to just above a small task. Setting it below the small
task threshold would cause new tasks to be packed which is
very likely too aggressive.

Change-Id: Idace26cc0252e31a5472c73534d2f5277a1e3fa4
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>