Add driver stats

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Add driver stats via debugfs

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fix compile error in driver stats

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Add driver info via debugfs

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>