configs/olimex_imx233_olinuxino: readme: Adjust the generated file names

After the conversion to the common genimage scripts the generated file list
is a bit different, so adjust it accordingly.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

board/olimex/imx233_olinuxino/readme.txt

@@ -8,12 +8,12 @@ It also pulls up the console on the serial port, not on TV output.
 === Output files after building ==============================================
 
 output/images
-+-- kernel.vfat (VFAT kernel partition image generated by genimage)
++-- boot.vfat (VFAT kernel partition image generated by genimage)
++-- imx23-olinuxino.dtb (device tree blob)
 +-- rootfs.ext2 (Root file system)
 +-- sdcard.img (Complete SD card image generated by genimage)
 +-- u-boot.sd (U-Boot image)
-+-- uImage -> uImage.imx23-olinuxino (To copy kernel as "uImage" to kernel.vfat)
-+-- uImage.imx23-olinuxino (Kernel uImage)
++-- uImage  (Kernel binary)
 
 === Use of generated SD card image ===========================================