linux-phytec-ti

dt-bindings: cadence-quadspi: Add DT bindings to OSPI PHY

Cadence OSPI IP has a integrated PHY module used to communicate with
high speed Octal flashes. Add DT bindings indicate presence of this PHY
module to the controller driver.

Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>