habanalabs: create common folder

For internal needs of our CI we need to move all the common code into a
common folder instead of putting them in the root folder of the driver.

Same applies to the common header files under include/

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Omer Shpigelman <oshpigelman@habana.ai>