env: Move env_set() to env.h

Move env_set() over to the new header file.

Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/compulab/cl-som-imx7/cl-som-imx7.c b/board/compulab/cl-som-imx7/cl-som-imx7.c
index 94e7bf1..6cc7554 100644
--- a/board/compulab/cl-som-imx7/cl-som-imx7.c
+++ b/board/compulab/cl-som-imx7/cl-som-imx7.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <env.h>
 #include <environment.h>
 #include <mmc.h>
 #include <phy.h>
diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
index e9262c6..57bbe41 100644
--- a/board/compulab/cm_fx6/cm_fx6.c
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -11,6 +11,7 @@
 #include <ahci.h>
 #include <dm.h>
 #include <dwc_ahsata.h>
+#include <env.h>
 #include <environment.h>
 #include <fsl_esdhc_imx.h>
 #include <miiphy.h>
diff --git a/board/compulab/cm_t335/cm_t335.c b/board/compulab/cm_t335/cm_t335.c
index 95cbb77..fca7685 100644
--- a/board/compulab/cm_t335/cm_t335.c
+++ b/board/compulab/cm_t335/cm_t335.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <env.h>
 #include <environment.h>
 #include <errno.h>
 #include <miiphy.h>
diff --git a/board/compulab/cm_t35/cm_t35.c b/board/compulab/cm_t35/cm_t35.c
index 4d171f49..ead4700 100644
--- a/board/compulab/cm_t35/cm_t35.c
+++ b/board/compulab/cm_t35/cm_t35.c
@@ -12,6 +12,7 @@
  */
 
 #include <common.h>
+#include <env.h>
 #include <environment.h>
 #include <status_led.h>
 #include <netdev.h>
diff --git a/board/compulab/cm_t54/cm_t54.c b/board/compulab/cm_t54/cm_t54.c
index 504a537..d7c59d5 100644
--- a/board/compulab/cm_t54/cm_t54.c
+++ b/board/compulab/cm_t54/cm_t54.c
@@ -8,6 +8,7 @@
  */
 
 #include <common.h>
+#include <env.h>
 #include <environment.h>
 #include <fdt_support.h>
 #include <usb.h>