env: Remove <common.h> and add needed includes

Remove <common.h> from all "env/" files and when needed add
missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/env/flags.c b/env/flags.c
index e286636..233fd46 100644
--- a/env/flags.c
+++ b/env/flags.c
@@ -8,9 +8,9 @@
 #include <linux/string.h>
 #include <linux/ctype.h>
 
+#include <stdio.h>
 #ifdef USE_HOSTCC /* Eliminate "ANSI does not permit..." warnings */
 #include <stdint.h>
-#include <stdio.h>
 #include "fw_env_private.h"
 #include "fw_env.h"
 #include <env_attr.h>
@@ -18,7 +18,7 @@
 #define env_get fw_getenv
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 #else
-#include <common.h>
+#include <linux/kernel.h>
 #include <env_internal.h>
 #endif