msm: mhi_dev: Add ADPL HW channel support in MHI driver

Accelerated Data Path Logging channel is used to communicate
between host and modem using the IPA HW-accelerated path.

Change-Id: I649cbc136f404e44c78c6443d5586cbdeb0fd767
Signed-off-by: Siva Kumar Akkireddi <sivaa@codeaurora.org>