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/board/freescale/ls2080a/ls2080a.c b/board/freescale/ls2080a/ls2080a.c
index cc1822d..413a698 100644
--- a/board/freescale/ls2080a/ls2080a.c
+++ b/board/freescale/ls2080a/ls2080a.c
@@ -12,7 +12,7 @@
 #include <fdt_support.h>
 #include <linux/libfdt.h>
 #include <fsl-mc/fsl_mc.h>
-#include <environment.h>
+#include <env_internal.h>
 #include <asm/arch/soc.h>
 
 DECLARE_GLOBAL_DATA_PTR;