msm: msm_bus: Add support for qnoc in bus scaling driver

QNOC has different way of programming the QoS priorities for
the bus masters, so add support for QNOC in bus scaling driver.

Change-Id: I8235388b4bb169f656fcc39846e8cfd7ef15166b
Signed-off-by: Odelu Kukatla <okukatla@codeaurora.org>