msm: ipa4: Fix to increase coaleascing common event ring size

Because of smaller event size observing the event ring empty
error from GSI. Add changes to increase coaleascing channel
common event ring size.

Change-Id: I87a83497be9e2b34743efec8b6782adaca21d662
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>