platform: msm_bus: Change the QoS programming for BIMC masters

Currently the QoS values for BIMC masterports are programmed by
writing to the override registers in the BIMC hardware. Modify
this to use the BKE registers to program the QoS modes based on
recommendations from the design teams.

Change-Id: I58bcda159ea0633876d98c023ced33169acfad93
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>