initcall: Display error number when an error occurs

Now that some initcall functions return a useful error number, display it
when something goes wrong.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>

lib/initcall.c

@@ -15,14 +15,16 @@ int initcall_run_list(const init_fnc_t init_sequence[])
 
 	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 		unsigned long reloc_ofs = 0;
+		int ret;
 
 		if (gd->flags & GD_FLG_RELOC)
 			reloc_ofs = gd->reloc_off;
 		debug("initcall: %p\n", (char *)*init_fnc_ptr - reloc_ofs);
-		if ((*init_fnc_ptr)()) {
-			printf("initcall sequence %p failed at call %p\n",
+		ret = (*init_fnc_ptr)();
+		if (ret) {
+			printf("initcall sequence %p failed at call %p (err=%d)\n",
 			       init_sequence,
-			       (char *)*init_fnc_ptr - reloc_ofs);
+			       (char *)*init_fnc_ptr - reloc_ofs, ret);
 			return -1;
 		}
 	}