imx: imx8qm: imx8qm_mek switch to binman

Switch to use binman to pack images

Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
diff --git a/board/freescale/imx8qm_mek/README b/board/freescale/imx8qm_mek/README
index 570ed7e..b1a4c6c 100644
--- a/board/freescale/imx8qm_mek/README
+++ b/board/freescale/imx8qm_mek/README
@@ -40,7 +40,7 @@
 Build U-Boot
 ============
 $ make imx8qm_mek_defconfig
-$ make flash.bin
+$ make
 
 Flash the binary into the SD card
 =================================