board/zynq/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/zynq/genimage.cfg

@@ -6,10 +6,12 @@ image boot.vfat {
 			"devicetree.dtb",
 			"uImage"
 		}
+
 		file uramdisk.image.gz {
 			image = "rootfs.cpio.uboot"
 		}
 	}
+
 	size = 32M
 }