pcm-iio.x: Provide TLP metrics
pcm-iio.x: Provide TLP metrics

This patchset provides breakdown to see number of inbound posted (write)
and non-posted (read) transactions.

Change-Id: I03b19dd1703a9b8745f91108460291b4d92d2ec8
Signed-off-by: Lu, Patrick <22ddefca84300168c6ba7711a75f73be4fe8f718@intel.com>

opcm/pcm,opcm/pcm,opcm/pcm,opcm/pcm