msm: ipa4: Cleanup duplicate code used for setup coalescing pipe

Cleaning up duplicate code used for setup coalescing pipe and
using the existing function ipa_setup_sys_pipe function for
configuring coalescing pipe.

Change-Id: I22be19f202ce9da96e9c0776b2b4dfa276a0e27b
Signed-off-by: Praveen Kurapati <pkurapat@codeaurora.org>
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>