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/grsim_leon2.h b/include/configs/grsim_leon2.h
index 8be9898..66194a8 100644
--- a/include/configs/grsim_leon2.h
+++ b/include/configs/grsim_leon2.h
@@ -51,6 +51,7 @@
 #define CONFIG_CMD_DIAG
 #define CONFIG_CMD_ECHO		/* echo arguments		*/
 #define CONFIG_CMD_FPGA		/* FPGA configuration Support	*/
+#define CONFIG_CMD_FPGA_LOADMK
 #define CONFIG_CMD_IRQ
 #define CONFIG_CMD_ITEST	/* Integer (and string) test	*/
 #define CONFIG_CMD_LOADB	/* loadb			*/