[U-Boot] [PATCH 3/4] env: add missing <compiler.h> header file

[Pierre-Jean Texier]

Since commit af95f20 ("env: Create a new file for environment functions"),
a new header file exists.

So, this commit add a missing header file.

Fixes:

include/env.h:158:1: error: unknown type name ‘ulong’; did you mean ‘long’?
 ulong env_get_ulong(const char *name, int base, ulong default_val);
 ^~~~~
 long
include/env.h:158:49: error: unknown type name ‘ulong’; did you mean ‘long’?
 ulong env_get_ulong(const char *name, int base, ulong default_val);

Signed-off-by: Pierre-Jean Texier <pjtexier at koncepto.io>
---
 include/env.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/env.h b/include/env.h
index a74a261..b72239f 100644
--- a/include/env.h
+++ b/include/env.h
@@ -9,6 +9,7 @@
 #ifndef __ENV_H
 #define __ENV_H
 
+#include <compiler.h>
 #include <stdbool.h>
 #include <linux/types.h>
 
-- 
2.7.4