fbdev: Support the RGB565 colour space.

Tested on a Raspberry Pi.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavdevice/fbdev.c

@@ -58,6 +58,7 @@ static struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = {
     {  32,       3,           2,           8,            0,   AV_PIX_FMT_ABGR  },
     {  24,       0,           8,          16,            0,   AV_PIX_FMT_RGB24 },
     {  24,      16,           8,           0,            0,   AV_PIX_FMT_BGR24 },
+    {  16,      11,           5,           0,            0,   AV_PIX_FMT_RGB565 },
 };
 
 static enum AVPixelFormat get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)