env: Move env_valid to env.h

This enum is somewhat widely used to determine if the environment is valid
or not. Move it to the common environment header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

env/flash.c

@@ -11,6 +11,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <env.h>
 #include <environment.h>
 #include <linux/stddef.h>
 #include <malloc.h>

env/nowhere.c

@@ -9,6 +9,7 @@
 
 #include <common.h>
 #include <command.h>
+#include <env.h>
 #include <environment.h>
 #include <linux/stddef.h>
 

include/env.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Common environment functions
+ * Common environment functions and definitions
  *
  * (C) Copyright 2000-2009
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -14,6 +14,13 @@
 
 struct environment_s;
 
+/* Value for environment validity */
+enum env_valid {
+	ENV_INVALID,	/* No valid environment */
+	ENV_VALID,	/* First or only environment is valid */
+	ENV_REDUND,	/* Redundant environment is valid */
+};
+
 /**
  * env_get_id() - Gets a sequence number for the environment
  *

include/environment.h

@@ -165,13 +165,6 @@ extern const unsigned char default_environment[];
 #include <env_flags.h>
 #include <search.h>
 
-/* Value for environment validity */
-enum env_valid {
-	ENV_INVALID,	/* No valid environment */
-	ENV_VALID,	/* First or only environment is valid */
-	ENV_REDUND,	/* Redundant environment is valid */
-};
-
 enum env_location {
 	ENVL_UNKNOWN,
 	ENVL_EEPROM,