Fix statistics in the driver for phys_if and virt_if.

- Add a callback handler for virt_if messages
- Clean up the basic code around virt_if naming.

Change-Id: I2dcbe5039a483d1cf8565831b03e1c0b9589a543
Signed-off-by: Sol Kavy <skavy@codeaurora.org>
10 files changed