Merge tag 'gpmc-omap-for-v4.16-immutable' of https://github.com/rogerq/linux into next/drivers

Pull "OMAP-GPMC: driver updates for v4.16" from Roger Quadros:

* Error out only if both 'bank-width' and 'gpmc,device-width' DT properties are missing.

* tag 'gpmc-omap-for-v4.16-immutable' of https://github.com/rogerq/linux:
  memory: omap-gpmc: Make 'bank-width' property optional