env: Switch over to use environment location drivers

Move over to use a the master implementation of the location drivers, with
each method calling out to the appropriate driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>

env/env.c

@@ -143,3 +143,23 @@ int env_init_new(void)
 
 	return 0;
 }
+
+unsigned char env_get_char_spec(int index)
+{
+	return *(uchar *)(gd->env_addr + index);
+}
+
+void env_relocate_spec(void)
+{
+	env_load();
+}
+
+int saveenv(void)
+{
+	return env_save();
+}
+
+int env_init(void)
+{
+	return env_init_new();
+}