Port of a Linux commit 34be9b4

  Add bits and pieces needed to support IP block variant found on
  i.MX8MQ SoCs.

  Cc: p.zabel@pengutronix.de
  Cc: Fabio Estevam <fabio.estevam@nxp.com>
  Cc: cphealy@gmail.com
  Cc: l.stach@pengutronix.de
  Cc: Leonard Crestez <leonard.crestez@nxp.com>
  Cc: "A.s. Dong" <aisheng.dong@nxp.com>
  Cc: Richard Zhu <hongxing.zhu@nxp.com>
  Cc: Rob Herring <robh@kernel.org>
  Cc: devicetree@vger.kernel.org
  Cc: linux-imx@nxp.com
  Cc: linux-arm-kernel@lists.infradead.org
  Cc: linux-kernel@vger.kernel.org
  Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>