ARM: dts: msm: coalesce UL/DL MSIs for IPA HW channels

Coalesce MSIs used in event rings dedicated for the IPA HW and RSC
channels such that both uplink and downlink traffic uses the same
interrupt.

Change-Id: Iea49d366d92456d41cfe6a3faf496ae1add7825d
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>