msm: mdss: consider ib to commit the bw vote for mdp

For some use cases, the calculation of the ib
bandwidth prevails over the ab bandwidth. For
such use cases, we must consider the ib as well
as the ab before reducing/increasing the vote,
so the correct sequence to apply the bw vote
is executed along with the HW changes.
Current driver only considers the ab bw and
misses to consider the ib bw during the decision
of when to apply the bw vote.
This change includes ib into the consideration of
when to apply the bw vote.

CRs-Fixed: 1057105
Change-Id: I0822f2e60c4ac22b1636d1d5988ba322dafcdb49
Signed-off-by: Ingrid Gallardo <ingridg@codeaurora.org>
Signed-off-by: Abhijith Desai <desaia@codeaurora.org>