qcacmn: Fix for IPA rx buff map failure

Add an atomic variable to indicate IPA pipes are connected.
Use it to ensure that SMMU mapping for rx buffers is sent
to IPA even if REO is not remapped but IPA pipes are connected.

Change-Id: I5d82dc073fc2f0de6df102f7bfd2a1e945297aa8
CRs-Fixed: 2552128
3 files changed