serial: Allow serial to be absent in TPL

At present this option applies to SPL, but it should be available in TPL
also, and separately. Change to using CONFIG_IS_ENABLED(), add a new
Kconfig option and fix up hang().

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/hang.c b/lib/hang.c
index bf56f4c..c5a7869 100644
--- a/lib/hang.c
+++ b/lib/hang.c
@@ -20,8 +20,9 @@
  */
 void hang(void)
 {
-#if !defined(CONFIG_SPL_BUILD) || (defined(CONFIG_SPL_LIBCOMMON_SUPPORT) && \
-		defined(CONFIG_SPL_SERIAL_SUPPORT))
+#if !defined(CONFIG_SPL_BUILD) || \
+		(CONFIG_IS_ENABLED(LIBCOMMON_SUPPORT) && \
+		 CONFIG_IS_ENABLED(SERIAL_SUPPORT))
 	puts("### ERROR ### Please RESET the board ###\n");
 #endif
 	bootstage_error(BOOTSTAGE_ID_NEED_RESET);