linux-phytec-ti

dt-bindings: net: ti, icssg-prueth: drop enable-rgmii-delay

As per TRM we need to have rgmii TX delay always enabled in the
ICSSG mac. Drop this property.

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