imx: imx8qm-rom7720: switch to binman

Switch to use binman to pack images

Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
diff --git a/board/advantech/imx8qm_rom7720_a1/imximage.cfg b/board/advantech/imx8qm_rom7720_a1/imximage.cfg
index 5ecde0c..4303508 100644
--- a/board/advantech/imx8qm_rom7720_a1/imximage.cfg
+++ b/board/advantech/imx8qm_rom7720_a1/imximage.cfg
@@ -4,8 +4,8 @@
  */
 
 
-/* Boot from SD, sector size 0x400 */
-BOOT_FROM SD 0x400
+BOOT_FROM	sd
+
 /* SoC type IMX8QM */
 SOC_TYPE IMX8QM
 /* Append seco container image */