soc: swr-mstr: Change master interrupt to edge type

Change master interrupt to edge type handling to avoid
recurring interrupts during ssr. Add loop logic to handle
concurrent edge type interrupts.

Change-Id: I3c789a24c035a6a00b1a2f515aa5328546ad80a9
Signed-off-by: Ramprasad Katkam <katkam@codeaurora.org>