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/Makefile

@@ -1 +1,2 @@
 obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
+obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o