Rename bootretry functions and remove #ifdefs

Add a bootretry_ prefix to these two functions, and remove the need for
the #ifdef around everything (it moves to the Makefile).

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/hymod/hymod.c b/board/hymod/hymod.c
index f6990e9..0183f78 100644
--- a/board/hymod/hymod.c
+++ b/board/hymod/hymod.c
@@ -415,13 +415,11 @@
 	hymod_conf_t *cp = &gd->bd->bi_hymod_conf;
 	int rc;
 
-#ifdef CONFIG_BOOT_RETRY_TIME
 	/*
 	 * we use the cli_readline() function, but we also want
 	 * command timeout enabled
 	 */
-	init_cmd_timeout ();
-#endif
+	bootretry_init_cmd_timeout();
 
 	memset ((void *) cp, 0, sizeof (*cp));