env: Rename environment.h to env_internal.h

This file contains lots of internal details about the environment. Most
code can include env.h instead, calling the functions there as needed.

Rename this file and add a comment at the top to indicate its internal
nature.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
[trini: Fixup apalis-tk1.c]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/tools/envcrc.c b/tools/envcrc.c
index 7eb7246..672ef4d 100644
--- a/tools/envcrc.c
+++ b/tools/envcrc.c
@@ -59,7 +59,7 @@
 
 
 #ifdef CONFIG_BUILD_ENVCRC
-# include <environment.h>
+# include <env_internal.h>
 extern unsigned int env_size;
 extern env_t embedded_environment;
 #endif	/* CONFIG_BUILD_ENVCRC */