arm: socfpga: soc64: Enable FIT image generation using binman

Enable BINMAN when using Arm-Trusted-Firmware (ATF) to
generate FIT images.
Signed-off-by: NSiew Chin Lim <elly.siew.chin.lim@intel.com>

arch/arm/mach-socfpga/Kconfig

@@ -33,6 +33,7 @@ config TARGET_SOCFPGA_AGILEX
 	bool
 	select ARMV8_MULTIENTRY
 	select ARMV8_SET_SMPEN
+	select BINMAN if SPL_ATF
 	select CLK
 	select FPGA_INTEL_SDM_MAILBOX
 	select NCORE_CACHE
@@ -78,6 +79,7 @@ config TARGET_SOCFPGA_STRATIX10
 	bool
 	select ARMV8_MULTIENTRY
 	select ARMV8_SET_SMPEN
+	select BINMAN if SPL_ATF
 	select FPGA_INTEL_SDM_MAILBOX
 
 choice