include: extension_board: Increase overlay file name size

Upstream overlays like the ARM64 TI
k3-am625-beagleplay-csi2-tevi-ov5640.dtso can easily have more then
32 characters. Increase the overlay length to 64 characters to
apply overlays with longer names.

Signed-off-by: Daniel Schultz <d.schultz@phytec.de>
Acked-by: Kory Maincent <kory.maincent@bootlin.com>

include/extension_board.h

@@ -14,7 +14,7 @@ struct extension {
 	char name[32];
 	char owner[32];
 	char version[32];
-	char overlay[32];
+	char overlay[64];
 	char other[32];
 };