of_get_drm_display_mode — get a drm_display_mode from devicetree
| int of_get_drm_display_mode ( | struct device_node * np, | 
| struct drm_display_mode * dmode, | |
| int index ); | 
npdevice_node with the timing specification
dmodewill be set to the return value
indexindex into the list of display timings in devicetree