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>

arch/arm/Kconfig

@@ -1085,6 +1085,7 @@ config ARCH_VERSAL
 	select DM_SERIAL
 	select OF_CONTROL
 	imply BOARD_LATE_INIT
+	imply ENV_VARS_UBOOT_RUNTIME_CONFIG
 
 config ARCH_VF610
 	bool "Freescale Vybrid"
@@ -1120,6 +1121,7 @@ config ARCH_ZYNQ
 	imply CMD_CLK
 	imply CMD_DM
 	imply CMD_SPL
+	imply ENV_VARS_UBOOT_RUNTIME_CONFIG
 	imply FAT_WRITE
 
 config ARCH_ZYNQMP_R5
@@ -1159,6 +1161,7 @@ config ARCH_ZYNQMP
 	select ZYNQMP_IPI
 	imply BOARD_LATE_INIT
 	imply CMD_DM
+	imply ENV_VARS_UBOOT_RUNTIME_CONFIG
 	imply FAT_WRITE
 	imply MP
 	imply DM_USB_GADGET

board/xilinx/versal/board.c

@@ -116,6 +116,9 @@ int board_late_init(void)
 		return 0;
 	}
 
+	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+		return 0;
+
 	bootmode = versal_get_bootmode();
 
 	puts("Bootmode: ");

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 @@ int board_late_init(void)
 	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";

board/xilinx/zynqmp/zynqmp.c

@@ -568,6 +568,9 @@ int board_late_init(void)
 		return 0;
 	}
 
+	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+		return 0;
+
 	ret = set_fdtfile();
 	if (ret)
 		return ret;