board/kontron/pitx-imx8m/genimage.cfg: fix option suffix

Option 'offset = 33k' must be 'offset = 33K'.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Acked-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

board/kontron/pitx-imx8m/genimage.cfg

@@ -5,7 +5,7 @@ image sdcard.img {
 	partition imx-boot {
 		in-partition-table = "no"
 		image = "imx8-boot-sd.bin"
-		offset = 33k
+		offset = 33K
 	}
 
 	partition rootfs {