video: Rename structs and functions to avoid VBE

Rename these to VESA, itself an abbreviation, to avoid a conflict with
Verified Boot for Embedded.

Rename this to avoid referencing VBE.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/vesa.c b/drivers/video/vesa.c
index 91da939..cac3bb0 100644
--- a/drivers/video/vesa.c
+++ b/drivers/video/vesa.c
@@ -17,7 +17,7 @@
 	ulong fbbase;
 	int ret;
 
-	ret = vbe_setup_video(dev, NULL);
+	ret = vesa_setup_video(dev, NULL);
 	if (ret)
 		return log_ret(ret);