xilinx: Add support for ENV_VARS_UBOOT_RUNTIME_CONFIG

Start to use ENV_VARS_UBOOT_RUNTIME_CONFIG to enable/disable updating
variables with run time information.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/board/xilinx/versal/board.c b/board/xilinx/versal/board.c
index 3dc7044..a5ca4ca 100644
--- a/board/xilinx/versal/board.c
+++ b/board/xilinx/versal/board.c
@@ -116,6 +116,9 @@
 		return 0;
 	}
 
+	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+		return 0;
+
 	bootmode = versal_get_bootmode();
 
 	puts("Bootmode: ");
diff --git a/board/xilinx/zynq/board.c b/board/xilinx/zynq/board.c
index 2164eac..7ac069a 100644
--- a/board/xilinx/zynq/board.c
+++ b/board/xilinx/zynq/board.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <init.h>
+#include <log.h>
 #include <dm/uclass.h>
 #include <env.h>
 #include <fdtdec.h>
@@ -33,6 +34,14 @@
 	char *new_targets;
 	char *env_targets;
 
+	if (!(gd->flags & GD_FLG_ENV_DEFAULT)) {
+		debug("Saved variables - Skipping\n");
+		return 0;
+	}
+
+	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+		return 0;
+
 	switch ((zynq_slcr_get_boot_mode()) & ZYNQ_BM_MASK) {
 	case ZYNQ_BM_QSPI:
 		mode = "qspi";
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 2a430a9..b4e7301 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -568,6 +568,9 @@
 		return 0;
 	}
 
+	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+		return 0;
+
 	ret = set_fdtfile();
 	if (ret)
 		return ret;