soc: qcom: glink: Add Quality of Service(QoS) support

Add support for G-Link clients to register for QoS requirements. G-Link
will keep track of QoS requirements for multiple channels and ensure
them.

CRs-Fixed: 841019
Change-Id: Iafe5a5c2917671e0e52db9076eeba9bf1d3de389
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@codeaurora.org>