fpga: Guard the LOADMK functionality with CMD_FPGA_LOADMK

Guard the LOADMK functionality with config to provide
an option to enable or disable it.
Enable it for all platforms in mainline which enable CONFIG_CMD_FPGA.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index 731e69b..8eea24a 100644
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -191,6 +191,7 @@
 #define CONFIG_FPGA_XILINX
 #define CONFIG_FPGA_ZYNQPL
 #define CONFIG_CMD_FPGA
+#define CONFIG_CMD_FPGA_LOADMK
 
 /* Open Firmware flat tree */
 #define CONFIG_OF_LIBFDT