video: Drop references to CONFIG_VIDEO et al

Drop the Kconfigs which are not used and all references to them. In
particular, this drops CONFIG_VIDEO to avoid confusion and allow us to
eventually rename CONFIG_DM_VIDEO to CONFIG_VIDEO.

Also drop the prototype for video_get_info_str() which is no-longer used.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Jason Liu <jason.hui.liu@nxp.com>
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index e49f5bf..beb8bb9 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -67,7 +67,7 @@
 	 * @mem_clk: memory clock rate in Hz
 	 */
 	unsigned long mem_clk;
-#if defined(CONFIG_LCD) || defined(CONFIG_VIDEO) || defined(CONFIG_DM_VIDEO)
+#if defined(CONFIG_LCD) || defined(CONFIG_DM_VIDEO)
 	/**
 	 * @fb_base: base address of frame buffer memory
 	 */