env: Rename environment to embedded_environment

The name 'environment' is widely used in U-Boot so is not a very useful
name of a variable. Rename it to better indicate its purpose.

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>
diff --git a/env/flash.c b/env/flash.c
index dca6567..a26d943 100644
--- a/env/flash.c
+++ b/env/flash.c
@@ -47,7 +47,7 @@
 #if defined(CONFIG_ENV_ADDR_REDUND) && defined(CMD_SAVEENV) || \
 	!defined(CONFIG_ENV_ADDR_REDUND) && defined(INITENV)
 #ifdef ENV_IS_EMBEDDED
-static env_t *env_ptr = &environment;
+static env_t *env_ptr = &embedded_environment;
 #else /* ! ENV_IS_EMBEDDED */
 
 static env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;