The "hnp-srp-disable" property for dwc2 is specific to U-boot, not part
of upstream Linux's device tree bindings.
Move it to rk3328-u-boot.dtsi to avoid losing it when syncing device
tree files.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>