imx: imx8mm-icore: migrate to use BINMAN

Use BINMAN instead of imx specific packing method.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index 09b9d56..979b30a 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -69,6 +69,7 @@
 
 config TARGET_IMX8MM_ICORE_MX8MM
 	bool "Engicam i.Core MX8M Mini SOM"
+	select BINMAN
 	select IMX8MM
 	select SUPPORT_SPL
 	select IMX8M_LPDDR4