interconnect: Aggregate before setting initial bandwidth

When setting the initial bandwidth, make sure to call the aggregate()
function (if such is implemented for the current provider), to handle
cases when data needs to be aggregated first.

Fixes: b1d681d8

 ("interconnect: Add sync state support")
Acked-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20201013135913.29059-1-georgi.djakov@linaro.org


Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>