dt-bindings: gpu: Convert Samsung Image Rotator to dt-schema

[ Upstream commit 6e3ffcd592060403ee2d956c9b1704775898db79 ]

Convert Samsung Image Rotator to newer dt-schema format.

Signed-off-by: Maciej Falkowski <m.falkowski@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Stable-dep-of: 338c4d3902fe ("igb: Disable threaded IRQ for igb_msix_other")
Signed-off-by: Sasha Levin <sashal@kernel.org>