soc: qcom: dfc: Enable QMAP DFC commands

Enable QMAP DFC commands to either request new grants when
current grant reaches threshold or acknowledge the flow
disable messages.

CRs-fixed: 2280803
Change-Id: I46fb37ceaabfc8d25c877e1ef232176f63a0e76c
Acked-by: Weiyi Chen <weiyic@qti.qualcomm.com>
Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>