env: common: Make env_get_addr/get_char_memory() static

These functions are not used outside this file. Make them static and order
them to avoid forward declarations.

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

include/environment.h

@@ -202,10 +202,6 @@ extern struct hsearch_data env_htab;
 /* Function that returns a character from the environment */
 unsigned char env_get_char(int);
 
-/* Function that returns a pointer to a value from the environment */
-const unsigned char *env_get_addr(int);
-unsigned char env_get_char_memory(int index);
-
 /* Function that updates CRC of the enironment */
 void env_crc_update(void);