interconnect: Always call pre_aggregate before aggregate

interconnect: Always call pre_aggregate before aggregate

The pre_aggregate callback isn't called in all cases before calling
aggregate. Add the missing calls so providers can rely on consistent
framework behavior.

Fixes: 37b82f8539b4 ("interconnect: Aggregate before setting initial bandwidth")
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
Link: https://lore.kernel.org/r/20210721175432.2119-3-mdtipton@codeaurora.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>