alloc: Only use common UL slots when calculating the capacity

Currently al possible UL slots are included in the capacity
calculation which is the base of the slot selection. Nevertheless
UL-only slots will never be used, since only one uplink slot (which
must be a common slot) will be used.

This patch changes the code to only include common slots in the
capacity sum.

Note that this might not be optimal if algorithm B supported
multiple uplink slots.

Sponsored-by: On-Waves ehf
4 files changed