video: meson: Drop unnecessary header includes

These files should not be included in meson header files. Drop them and
tidy up the affected C files.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/video/meson/meson_canvas.c b/drivers/video/meson/meson_canvas.c
index b71cbfc..eccac2f 100644
--- a/drivers/video/meson/meson_canvas.c
+++ b/drivers/video/meson/meson_canvas.c
@@ -6,6 +6,10 @@
  * Author: Neil Armstrong <narmstrong@baylibre.com>
  */
 
+#include <common.h>
+#include <dm.h>
+#include <asm/io.h>
+
 #include "meson_vpu.h"
 
 /* DMC Registers */