lib: uuid: Do not enable UUID command SPL

The uuid command is only really useful in U-Boot, but it's useless in
SPL. Worse yet, it pulls in various environment manipulation functions
as it call env_set(). Do not compile the command in in SPL.
Signed-off-by: NMarek Vasut <marek.vasut+renesas@gmail.com>
Cc: Tom Rini <trini@konsulko.com>

lib/uuid.c

@@ -271,7 +271,7 @@ void gen_rand_uuid_str(char *uuid_str, int str_format)
 	uuid_bin_to_str(uuid_bin, uuid_str, str_format);
 }
 
-#ifdef CONFIG_CMD_UUID
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_CMD_UUID)
 int do_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	char uuid[UUID_STR_LEN + 1];