Correct SPL uses of ENV_VARS_UBOOT_RUNTIME_CONFIG

This converts 4 usages of this option to the non-SPL form, since there is
no SPL_ENV_VARS_UBOOT_RUNTIME_CONFIG defined in Kconfig

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/xilinx/versal-net/board.c b/board/xilinx/versal-net/board.c
index 5fb7110..7ff2c62 100644
--- a/board/xilinx/versal-net/board.c
+++ b/board/xilinx/versal-net/board.c
@@ -172,7 +172,7 @@
 		return 0;
 	}
 
-	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+	if (!IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG))
 		return 0;
 
 	return board_late_init_xilinx();
diff --git a/board/xilinx/versal/board.c b/board/xilinx/versal/board.c
index 4cdc2ec..81e1b69 100644
--- a/board/xilinx/versal/board.c
+++ b/board/xilinx/versal/board.c
@@ -142,7 +142,7 @@
 		return 0;
 	}
 
-	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+	if (!IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG))
 		return 0;
 
 	bootmode = versal_get_bootmode();
diff --git a/board/xilinx/zynq/board.c b/board/xilinx/zynq/board.c
index df4c457..9a59445 100644
--- a/board/xilinx/zynq/board.c
+++ b/board/xilinx/zynq/board.c
@@ -55,7 +55,7 @@
 		return 0;
 	}
 
-	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+	if (!IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG))
 		return 0;
 
 	switch ((zynq_slcr_get_boot_mode()) & ZYNQ_BM_MASK) {
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index e3f70c4..39da96b 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -405,7 +405,7 @@
 		return 0;
 	}
 
-	if (!CONFIG_IS_ENABLED(ENV_VARS_UBOOT_RUNTIME_CONFIG))
+	if (!IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG))
 		return 0;
 
 	ret = set_fdtfile();