board/pandaboard/genimage.cfg: beautify file

Beatify this genimage .cfg file to have consistency with all genimage .cfg
files in Buildroot.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

board/pandaboard/genimage.cfg

@@ -5,6 +5,7 @@ image boot.vfat {
 			"u-boot.img"
 		}
 	}
+
 	size = 8M
 }