errno: Avoid including strings in SPL
At present the header file defines this function in SPL but the file may
not actually be built. This causes a build error if the option is enabled.
Fix the condition in the header file.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/errno.h b/include/errno.h
index 652ad67..5a8816d 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -25,7 +25,7 @@
* Return: string describing the error. If CONFIG_ERRNO_STR is not
* defined an empty string is returned.
*/
-#ifdef CONFIG_ERRNO_STR
+#if CONFIG_IS_ENABLED(ERRNO_STR)
const char *errno_str(int errno);
#else
static const char error_message[] = "";