dfc: Adjust QMAP query grants

The grants sent by DS in the query response is based on the current
watermark levels. Due to UL accumulation, the grants may not reflex
the real data capacity. This could cause AP to send more data than
expected especially after multiple queries and lead to DNE packet
drops.

Adjust grants from QMAP query response based on the new field in the
resposne indicating the amount of data that already received to more
accurately assess how much data can be sent.

Change-Id: I9da42a9d2425b491cdef375492dbf4d7f7552dff
Acked-by: Weiyi Chen <weiyic@qti.qualcomm.com>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>