board/olimex/a64_olinuxino/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/olimex/a64-olinuxino/genimage.cfg

@@ -6,6 +6,7 @@ image boot.vfat {
 			"boot.scr"
 		}
 	}
+
 	size = 64M
 }
 
@@ -16,7 +17,7 @@ image sdcard.img {
 	partition spl {
 		in-partition-table = "no"
 		image = "sunxi-spl.bin"
-		offset = 8192
+		offset = 8K
 	}
 
 	partition u-boot {