drm/panel: add ld9040 driver

The patch adds LD9040 parallel RGB panel driver with SPI control interface.
The driver uses drm_panel framework.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/panel/Kconfig

@@ -16,4 +16,11 @@ config DRM_PANEL_SIMPLE
 	  that it can be automatically turned off when the panel goes into a
 	  low power state.
 
+config DRM_PANEL_LD9040
+	tristate "LD9040 RGB/SPI panel"
+	depends on DRM && DRM_PANEL
+	depends on OF
+	select SPI
+	select VIDEOMODE_HELPERS
+
 endmenu

drivers/gpu/drm/panel/Makefile

 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o