delay_timer: correct sparse issues and warnings
Use NULL instead of 0 where required.
Include headers to have the prototype of the functions.
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/drivers/delay_timer/generic_delay_timer.c b/drivers/delay_timer/generic_delay_timer.c
index 6a9d314..8a36c8a 100644
--- a/drivers/delay_timer/generic_delay_timer.c
+++ b/drivers/delay_timer/generic_delay_timer.c
@@ -9,6 +9,7 @@
#include <bl_common.h>
#include <debug.h>
#include <delay_timer.h>
+#include <generic_delay_timer.h>
#include <platform.h>
/* Ticks elapsed in one second by a signal of 1 MHz */