drm/exynos: scaler: Add support for tiled formats

Add support for 16x16 tiled formats: NV12/NV21, YUYV and YUV420.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixed line over 80 characters warning
Signed-off-by: Inki Dae <inki.dae@samsung.com>