board/technologic/ts7680/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/technologic/ts7680/genimage.cfg

@@ -3,7 +3,7 @@ image sdcard.img {
 	}
 
 	partition unused {
-		size =  512
+		size = 512
 	}
 
 	partition rootfs {