This prepares the driver for v3 support. The v3 controller
has a completely different register layout, so add a V1_V2_
namespace to the register defines to avoid confusion with
the v3 regs.
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>